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®
MiniMax CH
POOL & SPA HEATERS
OPERATION & INSTALLATION MANUAL
WARNING
FOR YOUR SAFETY - READ BEFORE OPERATING
Warning: If you do not follow these instructions exactly, a fire or explosion may
result, causing property damage, personal injury or loss of life.
For additional free copies of this manual; call (800) 831-7133.
To
Consumer
Retain For
Future
Reference
U.S. Patent Numbers
6,295,980
5,318,007 - 5,228,618
5,201,307 - 4,595,825
WARNING
Warning: Improper installation, adjustment, a
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2 Table of Contents Introduction ............................................................................................................... 3 Important Notices ...................................................................................................................................................................... 3 Warranty Information .................................................................................................................................................
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3 Introduction MiniMax CH Pool and Spa Heaters Congratulations on your purchase of a MiniMax CH high performance heating system. Proper installation and service of your new heating system and correct chemical maintenance of the water will ensure years of enjoyment. The MiniMax CH is a compact, lightweight and efficient gas fired high performance pool and spa heater that can be directly connected to schedule 40 PVC pipe and has a built-in top. The MiniMax CH is a millivolt heater and has a self s
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Operation (contd.) 4 This instruction manual provides operating instructions, PRODUCT IDENTIFICATION installation and service information for the MiniMax CH high performance heater. The information in this manual applies to To identify the heater, see rating plate on the inner front panel of the the MiniMax CH 150, 200, 250, 300, 350, and 400 natural gas heater. There are two designators for each heater, one is the Model and propane (LP) models. Number and the other is the Heater Identificatio
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Operation (contd.) 5 MINIMAX CH MILLIVOLT LIGHTING/OPERATION-NATURAL GAS & PROPANE FOR YOUR SAFETY: READ BEFORE LIGHTING WARNING If you do not follow these instructions exactly, a fire or explosion may result causing personal injury, loss of life and property damage. Since propane gas is heavier than air, escaping propane will accumulate and remain at ground level. Do not attempt to light the heater. If you suspect a propane leak, lighting the heater can result in a fire or explosion which can
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Operation (contd.) 6 OPERATING (CONTROLS) Dual Temperature Control System For convenience and economy all MiniMax CH heaters are equipped with two thermostats on the front of the heater control panel; see Figure 5. POOL SPA THERMOSTAT KNOB STOPPER OFF Each thermostat is equipped with a mechanical stop that can be locked or unlocked with use of a screwdriver to prevent temperatures in excess of that desired by the user; see Figure 6. The maximum setting can be adjusted by COLD HOT COLD HOT POOL T
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7 Maintenance MAINTENANCE INSTRUCTIONS CAUTION REMOVE THE FLOW VALVE ASSEMBLY WHEN DRILLING It is recommended that you check the following items at least THE HOLE TO INSTALL A PRV. OTHERWISE, YOU WILL every six months and at the beginning of every swimming season. DRILL INTO THE VALVE ASSEMBLY. 1. Examine the venting system. Make sure there are no ob- structions in the flow of combustion and ventilation air. Pressure Relief Valve 2. Visually inspect the main burner and the pilot burner In some i
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Maintenance (contd.) 8 RULE: 7.4 to 7.6 is a desirable pH range. It is essential CHEMICAL BALANCE to maintain correct pH, see Table 2. POOL AND SPA WATER If pH becomes too high (over alkaline), it Your Pentair Pool Products pool heater was designed has these effects: specifically for your spa or pool and will give you many 1. Greatly lowers the ability of chlorine to destroy years of trouble free service provided you keep your bacteria and algae. water chemistry in proper condition. 2. Water be
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9 Installation Instructions SPECIFICATIONS IMPORTANT NOTICE: These installation instructions are designed for use by qualified personnel only, trained especially for installation of this type of heating equipment and related components. Some states require installation and repair by licensed personnel. If this applies in your state, be sure your contractor bears the appropriate license. Outdoor installation - stackless POOL SPA Mm odel"m A" Di "B" Di OFF TM CH HIGH PERFORMANCE HEATER COLD HOT
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POOL SPA OFF CO L D HOT CO L D HOT T HE R MO S T A T S LE ET C P OO L E T MP SPA E T MP Installation (contd.) 10 MANUAL BY-PASS Where the flow rate exceeds the maximum 120 TO PUMP POOL GPM, a manual bypass should be installed and FILTER POOL MANUAL ISOLATION 3 BY-PASS adjusted. After adjustments are made, the valve HEATER VALVE CHECK 1 VALVE handle should be removed to avoid tampering. ISOLATION VALVE CHECK 2 1 Optional. VALVE FROM 2 Required when installation is below water level. POOL Figure
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11 Installation (contd.) WATER CONNECTIONS INSULATING THE HIGH LIMITS Reversible Inlet/Outlet Connection When Reversing Heads on the MiniMax CH Heater The MiniMax CH heater is factory assembled with right side inlet/outlet water connections. The inlet/ On the MiniMax CH heater there is insulation installed outlet header can be reversed for left side water by the factory on the return head side of the heaters. connections without removing the heat exchanger. This insulation is there so that if th
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Installation (contd.) 12 GAS CONNECTIONS GAS LINE INSTALLATIONS Before installing the gas line, be sure to check which gas the heater has been designed to burn. This is important because different types of gas require different gas pipe sizes. The rating plate on the heater will indicate which gas the heater is designed to burn. Tables 7-9, on pages 12 and 13, shows which size pipe is required for the distance from the gas meter to the heater. The table is for natural gas at a specific gravity o
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13 Installation (contd.) Pipe Sized For Length Of Run In Equivalent Feet, (cont’d.) PROPANE 2 STAGE REGULATION In many “RESIDENTIAL” Propane gas line installations, the gas supplier and or installer will utilize a two stage regulation process where by at the supply tank they will install the first stage gas regulator, which would be at a higher pressure, usually 10 psi and can be for longer distance and in a smaller pipe size. Then within a short distance from the heater they will install a sec
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DOOR Installation (contd.) 14 VENTILATION STACK TYPE OUTDOOR VENT KIT Mp odelV. ent CaP. roduct No Vent Dia OUTDOOR INSTALLATION ONLY 15 50O7 V14. 6023 6 in For outdoor installation with built in vent top, the heater 20 00O2 V24. 6022 7 in must be placed in a suitable area on a level, noncombustible surface. Do not install the heater under 25 50O3 V24. 6022 7 in an overhang with clearances less than 3 feet from the top 30 00O4 V34. 6022 8 in of the heater. The area under an overhang must be open
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15 Installation (contd.) INDOOR INSTALLATION (USA ONLY) OUTDOOR SHELTER INSTALLATION (CANADA) All products of combustion and vent gases must be Installations in basements, garages, or completely removed to the outside atmosphere underground structures where flammable liquids through a vent pipe which is connected to the draft may be stored must have the heater elevated 18 hood. A vent pipe extension of the same size must inches from the floor using a non-combustible be connected to the draft hoo
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THERMOS T A T SELEC T Installation (contd.) 16 BASE FOR USE ON NOTE COMBUSTIBLE FLOORS The heater requires two uninterrupted air supply openings; one for ventilation and one to supply oxygen for proper gas combustion. The air supply openings TM should be sized according to Tables 12. and 13. Air supply requirements below apply to all MiniMax heaters All opening sizes are minimum and unobstructed. SHEET METAL BLOCKS HOLLOW MASONARY BLOCKS, NOT LESS THAN 4" THICK (LAID WITH ENDS UNSEALED AND JOI
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17 Installation (contd.) ELECTRICAL MiniMax CH Millivolt Wiring Diagram MINIMAX WIRING DIAGRAM (MILLIVOLT) DUAL THERM (HONEYWELL ELECTRONIC) IF ORIGINAL FACTORY WIRING MUST BE REPLACED, INSTALLER MUST SUPPLY UL OR CSA (IF CANADA) APPROVED WIRE, 18 GAUGE, 600V, 105 C˚ TEMPERATURE RATING. THERMAL FUSE WIRING MUST BE REPLACED WITH UL OR CSA (IF CANADA) APPROVED WIRE, 18 GAUGE, 600V, 125 C˚ TEMPERATURE RATING. INTERCONNECTING WIRING TO APPLIANCE MUST CONFORM TO THE NATIONAL ELECTRICAL CODE OR SUPER
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18 Troubleshooting - General Possible Cause Remedy Heater will not come on Pump not running Place pump in operation Pump air locked Check for leaks Filter dirty Clean filter Pump strainer clogged Clean strainer Defective wiring or connection Repair or replace wires Defective pressure switch Replace switch Defective gas controls Call serviceperson On-Off switch in "OFF" position Turn switch to "ON" Heater Short Cycling (Rapid On and Off Operation) Insufficient water flow Clean filter and pump str
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HOT 19 MINIMAX CH HEATER - ALL MODELS 32 INNER TOPS M. odel No. Part No 14 50 47002 25 00 47002 26 50 47002 37 00 47002 31 38 50 47002 49 00 47002 30 28 2 1a 29 3 37 4 20 1 15 27 23 24 16 22 18 25 26 21 5 34 7 19 6 35 9 8 36 17 33 14 10 11 13 12 Rev. C 1-22-04 P/N 472128
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20 MiniMax CH Parts List ITEM DESCRIPTION QTY 150 200 250 300 350 400 1)V1 ent kit assy. (indoor 8 460227 0 46022 1 46023 3 46023 4 46023 46023 1) aV1 ent kit assy. (outdoor 2 460237 3 46022 4 46022 5 46022 6 46022 46022 2rR1 eturn heade 4 070994 4 07099 4 07099 4 07099 4 07099 07099 3rB6 olt, heat exchange 1141 719941 719941 719941 719941 7199 47199 4DW6 asher 3/8" ID 1" O 14 4 0721804 721804 721804 721804 7218 07218 5tT8 ube seal gaske 11 1 07095 1 07095 1 07095 1 07095 1 07095 07095 6bT2 herm
