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INSTALLATION & OPERATING
INSTRUCTIONS
Models 399B–2339B
L
Types H & WH
W
WARNING: If these instructions are not followed exactly, a fire or explosion may
result causing property damage, personal injury or death.
FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors and
liquids or other combustible materials in the vicinity of this or any other appliance. To
do so may result in an explosion or fire.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do n
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Rev. 2 reflects the following: Changes to: Paragraph one of the Stacking section on page 9; Table G on page 16; Table H on page 18; Fig. 19 on page 22; Fig. 20–22 on page 23; Fig. 24 on page 24; the Wiring Diagrams on pages 39 and 40. The addition of: A wiring diagram note on page 38. 2
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CONTENTS WARNINGS 4 APPENDIX 49 BEFORE INSTALLATION 5 Inside Air Contamination 49 Product Receipt 5 WARRANTY 50 Model Identification 5 START-UP CHECKLIST 51 Ratings and Certifications 5 Installations at Elevation 5 Component Locations 6 General Information 7 GENERAL SAFETY 8 Time/Temperature Relationships in Scalds 8 INSTALLATION 9 Installation Codes 9 Equipment Base 9 Stacking 9 Clearances 11 Combustion and Ventilation Air 12 Conventional Combustion Air Supply 12 Water Piping 14 Hydronic Heatin
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WARNINGS Pay Attention to These Terms Indicates the presence of immediate hazards which will cause severe DANGER: personal injury, death or substantial property damage if ignored. Indicates the presence of hazards or unsafe practices which could cause WARNING: severe personal injury, death or substantial property damage if ignored. Indicates the presence of hazards or unsafe practices which could cause CAUTION: minor personal injury or product or property damage if ignored. Indicates special i
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number will have the form H8 1259B or similar BEFORE INSTALLATION depending on the heater size and configuration. The letter(s) in the first group of characters identifies the Raypak strongly recommends that this manual be re- application (H = Hydronic Heating, WH = Domestic viewed thoroughly before installing your Delta Limited Hot Water (DHW)). The number which fol-lows identi- heater. Please review the General Safety information fies the firing mode (1 or 4 = on-off, 3 = 2-stage, 8 = before i
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Component Locations OPTIONAL FLUE CONNECTION Fig. 1: Component Locations – Back Fig. 2: Component Locations – Left Side Panels removed for clarity Fig. 3: Component Locations – Front 6
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General Information Quantity of Vent Size (in.) Model No. Burners Gas Valves Blowers Flue Intake 399B 8 1 1 6 6 499B 10 2 1 6 6 649B 13 2 1 8 6 749B 15 2 1 8 6 899B 18 3 1 8 6 989B 11 2 2 10 10 1259B 14 3 2 12 10 1529B 17 4 2 12 10 1799B 20 4 2 14 10 1999B 23 5 3 14 10 2069B 23 5 3 14 10 2339B 26 5 3 16 10 Table A: Basic Data Burners per Valve Stages % Fire at Stage Model No. 1 1A 2 3 4 1 2 3 4 1 2 3 4 399B 8 1 100 499B 5 5 1 1, 2 50 100 649B 7 6 1 1, 2 54 100 749B 8 7 1 1, 2 53 100 899B 6 6 6 1
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GENERAL SAFETY To meet commercial hot water use needs, the high limit safety control on this water heater is adjustable up to 210°F. However, water temperatures over 125°F can cause instant severe burns or death from scalds. When supplying general purpose hot water, the rec- ommended initial setting for the temperature control is 125°F. Safety and energy conservation are factors to be con- sidered when setting the water temperature on the thermostat. The most energy-efficient operation will Wate
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The temperature of the water in the heater can be reg- Equipment Base ulated by using the temperature controller. To comply with safety regulations, the temperature controller is The heater should be mounted on a level, structurally set at the lowest setting when shipped from the facto- sound surface. The heater is approved for installation ry. on a combustible surface but must NEVER be installed on carpeting. Gas-fueled equipment installed To adjust the water temperature, insert a small straigh
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Fig. 6: Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations 1 2 U.S. Installations Canadian Installations Clearance above grade, veranda, porch, A 1 ft (30 cm) 1 ft (30 cm) deck, or balcony 4 ft (1.2m) below or to side Clearance to window or door that may be B of opening; 1 foot (30 cm) 3 ft (91 cm) opened above opening C Clearance to permanently closed window ** Vertical clearance to ventilated soffit located above the terminal within a horizontal dis- D 5
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In addition, the heater shall be installed such that the When installed according to the listed minimum clear- gas ignition system components are protected from ances from combustible construction, these heaters water (dripping, spraying, rain, etc.) during appliance can still be serviced without removing permanent operation or service (circulator replacement, control structural construction around the heater. However, for replacement, etc.). ease of servicing, we recommend a clearance of at lea
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Reversing Air Filter Follow these instructions to change the air duct con- nection from the left-hand side (standard) to the right-hand side: 1. Remove the four screws and the dust cover from the right-hand side of the heater. 2. Remove the four screws and the air filter bracket from the left-hand side of the heater. 3. Reverse the components and reattach in the new location, making sure that the air filter locking bracket is on the bottom. (The air filter locking bracket is reversible.) Fig. 8:
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space shall be considered in making this determina- b. Not less than the sum of the areas of all vent tion. Each opening shall have a minimum free area of connectors in the confined space. 2 2 1 in. per 1,000 BTUH (2,225 mm per kW) of the total input rating of all gas utilization equipment in the con- WARNING: Do not use one permanent opening 2 2 fined space, but not less than 100 in. (645 cm ). One method if the equipment room is under negative opening shall commence within 12 in. (305 mm) of t
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2 2 of not less than 1 in. for each 30,000 BTUH mm 5. Remove all plumbing fittings to the header. This per kW) of total rated input of the burner(s), and will include both inlet and outlet water pipe unions the location of the opening(s) shall not interfere and the pressure relief valve and drain piping. with the intended purpose of the opening(s) for ventilation air referred to in (1). This opening(s) 6. Remove limits, control bulbs and/or thermocou- can be ducted to a point not more than 18 in
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Cold Water Operation CAUTION: Damaging internal condensation may occur if the heater inlet water temperature does not exceed 105ºF (41ºC) within 7 minutes of start-up. A heater operated with an inlet temperature of less than 105ºF (41ºC) must have a manual bypass or an approved low-temperature operation system to pre- vent problems with condensation. A manual bypass, shown in Fig. 15, must be piped into the system at the time of installation. This piping is like a pri- mary/secondary boiler inst
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as the system heats up, the outlet temperature may Temperature & Pressure Gauge continue to climb and actuate the high limit, thereby shutting down the heater. Thus an automatic valve The temperature and pressure gauge is factory- system, such as a three-way proportional valve or a mounted in the in/out header. modulating two-way valve to control the bypass, should be utilized. Hydronic Heating Cold Water Run Pump Selection Cold water run differs from cold water start in that the system water e
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heaters which are not subject to thermal shock. Pressure Drop in Feet of Head Raypak offers a full line of electronic sequencers that Feedwater Regulator produce direct reset of heater water temperature. (Refer to the Controls section of the Raypak Catalog.) Raypak recommends that a feedwater regulator be in- stalled and set at 12 psi minimum pressure at the highest point of the system. Install a check valve or back flow device upstream of the regulator, with a manual shut-off valve as required
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Potable Water and Space Heating CAUTION: When this heater is used for both potable water and space heating, observe the following to ensure proper operation. 1. All piping materials and components connected to the water heater for the space heating application shall be suitable for use with potable water. 2. Toxic chemicals, such as used for boiler treatment, Fig. 13: Single Domestic Hot Water Heater and Storage shall not be introduced into the potable water used Tank for space heating. Gas Supp
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regulator must be installed to reduce the gas supply pressure to a maximum of 10.5 in. WC for natural gas and 13.0 in. WC for propane gas. The regulator should be placed a minimum distance of 10 times the pipe diameter up-stream of the heater gas controls. Refer to Table I for maximum pipe lengths. Gas Supply Connection CAUTION: The heater must be disconnected from the gas supply during any pressure testing of the gas supply system at test pressures in excess of 1/2 psi (3.45 kPa). Fig. 14: Ga
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pressure regulator, of the lockup type, must be CAUTION: Support gas supply piping with installed. hangers, not by the heater or its accessories. Make sure the gas piping is protected from physical When connecting additional gas utilization equipment damage and freezing, where required. to the gas piping system, the existing piping must be checked to determine if it has adequate capacity for Reversing Gas Supply Connection the combined load. Reversing the standard fuel connection from the left-
