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®
Installation RT-SVX10C-EN
Operation
Maintenance
Library Service Literature
Product Section Unitary
Product Rooftop Air Conditioning (Comm. SZ, 20 - 130 Tons)
Model SAH_, SEH_, SFH_, SLH_, SSH_, SXH_
Literature Type Installation/Operation/Maintenance
Sequence 10C
Date January 2005
File No. SV-UN-RT-RT-SVX10C-EN-01-05
Supersedes RT-SVX10C-EN 11/04
™™™
™™
INTELLIPAK
Commercial Single-Zone Rooftop Air
Conditioners with CV or VAV Controls
Models
"5" and later Design Sequence
SAHF -C20, -C25, -C30,
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About The Manual RT-SVX10B-EN (October 2003) Note: This document is customer property and Updated issue of this manual; provides specific installation, must be retained by the unit's owner for use by operation and maintenance instructions for S_HF with “6” maintenance personnel. and later design sequence and S_HG with “Y” and later de- sign sequence with constant volume (CV) or variable air vol- Literature Change History ume (VAV) controls. RT-SVX10C-EN (November 2004) RT-SVX10A-EN (May 200
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Table of Contents Section One Section Four About The Manual ............................................................... 2 Unit Start-Up ...................................................................... 55 Literature Change History ................................................ 2 Cooling Sequence of Operation .................................... 55 Overview of Manual ......................................................... 2 Gas Heating Sequence of Operation...........................
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General Information Model Number Description All products are identified by a multiple character model When ordering replacement parts or requesting service, be sure to refer to the specific model number, serial number, number listed on the unit nameplate. An explanation of the alphanumeric identification code is provided below. Its use and DL number (if applicable) stamped on the unit name- can define the unit's specific components, type of applica- plate. tion, i.e. CV or VAV, for a particular
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Sample Model No.: S X H G - D 1 1 4 0 A H 7 C G 8 D 1 0 0 1 AT,etc Digit No.: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21+ Digit 1 - Unit Type Digit 12 - Exhaust Air Fan Drive Digit 18 - Accessory Panel S = Self-Contained 0 = None 0 = None 5 = 500 RPM A = BAYSENS008* 6 = 600 RPM B = BAYSENS010* Digit 2 - Unit Function(s) E = DX Cooling, Electric Heat 7 = 700 RPM C = BAYSENS013* F = DX Cooling, Natural Gas Heat 8 = 800 RP
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General Information (Continued) Unit Nameplate Commonly Used Acronyms One Mylar unit nameplate is located on the outside upper For convenience, a number of acronyms and abbreviations left corner of the control panel door. It includes the unit are used throughout this manual. These acronyms are al- model number, serial number, electrical characteristics, phabetically listed and defined below. weight, refrigerant charge, as well as other pertinent unit BAS = Building automation systems data. A sma
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General Information (Continued) Rooftop Module (RTM - 1U48 Standard on all units) The Rooftop Module (RTM) responds to cooling, heating, Ventilation Override Module (VOM - Optional 1U51) and ventilation requests by energizing the proper unit com- The Ventilation Override module initiates specified func- ponents based on information received from other unit mod- tions such as; space pressurization, exhaust, purge, purge ules, sensors, remote panels, and customer supplied bi- with duct pressure co
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General Information (Continued) Ventilation Control Module (VCM - Design special For complete application details of the module, refer to En- option only) gineering Bulletin RT-EB-109. The Ventilation Control Module (VCM) is located in the filter section of the unit and is linked to the unit's UCM network. Input Devices & System Functions Using a "velocity pressure" sensing ring located in the fresh air section, allows the VCM to monitor and control the quan- The descriptions of the following ba
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General Information (Continued) 3S69 is a binary input device used on all rooftop units denser fans "On". If the operating fans can not bring the equipped with an exhaust fan. It is located in the exhaust condensing temperature to within the controlband, more fan section of the unit and is connected to the RTM (1U48). fans are turned on. As the saturated condensing tempera- During a request for fan operation, if the differential switch ture approaches the lower limit of the controlband, fans are
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General Information (Continued) Low Ambient Compressor Lockout compressor(s) on that circuit "Off", locks out all compressor Utilizes an analog input device for CV & VAV applications. operation for that circuit, and initiates a manual reset diag- When the system is configured for low ambient compressor nostic. lockout, the compressors are not allowed to operate if the Supply Air Temperature Low Limit temperature of the outside air falls below the lockout set- Uses the supply air temperature sens
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General Information (Continued) and the unit will return to discharge air control. If the occ Variable Air Volume (VAV) Units zone heating setpoint is less than the DWU terminate setpoint, the heat will turn off when the occ zone heat Occupied Heating - Supply Air Temperature setpoint is reached, but it will stay in DWU mode and cycle When a VAV units is equipped with "Modulating Heat", and the heat to maintain setpoint. the system is in an occupied mode, and the field supplied Unoccupied Heatin
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General Information (Continued) Space Temperature Averaging with Multiple Sensors Space Temperature Averaging Space temperature averaging for Constant Volume applica- tions is accomplished by wiring a number of remote sensors in a series/parallel circuit. The fewest number of sensors required to accomplish space temperature averaging is four. Figure 8 illustrates a single sensor circuit (Single Zone), four sensors wired in a series/parallel circuit (Four Zone), nine sensors wired in a series/par
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General Information (Continued) Control Module Locations for S_HF 40, 60, 70 & Control Module Locations for S_HF 50 & 55 Ton Units 75 Ton Units MCM MCM J J2-1 2-1 1 1U49 U49 M MCM CM B Bracke racket 1U49 1U49 J J1-1 1-1 R RT TM M H Heat MOD eat MOD 1U48 1U48 B Bracke racket J J2-1 2-1 T TCI MOD CI MOD 1U50 1U50 R RT TM M 1U54 1U54 J1-1 J1-1 Heat MOD Heat MOD 1U48 1U48 M Mounting ounting Bracke Bracket OR OR 1 1U50 U50 P Plate late J J1-1 1-1 LCI MOD LCI MOD J2-1 J2-1 J2-1 J2-1 B Bracke racket M
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Table of Contents Section One Section Four About The Manual ............................................................... 2 Unit Start-Up ...................................................................... 55 Literature Change History ................................................ 2 Cooling Sequence of Operation .................................... 55 Overview of Manual ......................................................... 2 Gas Heating Sequence of Operation..........................
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Installation Unit Inspection Storage Take precautions to prevent condensate from forming inside As soon as the unit arrives at the job site the unit’s electrical compartments and motors if: [ ] Verify that the nameplate data matches the data on the a. the unit is stored before it is installed; or, sales order and bill of lading (including electrical data). b. the unit is set on the roof curb, and temporary heat is [ ] Verify that the power supply complies with the unit name- provided in the buil
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Figure 3-1 Minimum Operation and Service Clearances for Single & Multiple Unit Installation 15
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16 Figure 3-2A SAHF Cooling-Only Units (20 thru 75 Ton)
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Installation (Continued) Table 3-1A Unit Dimensional Data Unit Dimensions Size ABCD E F G H J 20 & 25 Ton 21'-9 3/4" 5'-3 1/8" 7'-6 1/2" 5'-8 15/16" 3'-9 5/16" 12'-6" 1" 7' 1'-3 1/2" 30 Ton 21'-9 3/4" 5'-8 5/8" 7'-6 1/2" 6'-2 7/16" 4'-9 5/16" 12'-6" 1" 7' 1'-3 1/2" 40 Ton 27'-0" 6'-1 5/8" 7'-6 1/2" 6'-7 3/8" 5'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 50 & 55 Ton 29'-8" 5'-3 1/8" 7'-6 1/2" 5'-8 7/8" 6'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 60 Ton 27'-0" 6'-1 5/8" 9'-8" 6'-7 3/8" 5'-9 5/16" 15'-11 1/8" 1" 8' 2
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18 Figure 3-2B SEHF, SFHF, SLHF, SSHF, SXHF Units (20 thru 75 Ton)
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Installation (Continued) Table 3-2A Unit Dimensional Data Unit Dimensions Size AB CD E F GH J 20 & 25 Ton 24'-1 3/8" 5'-3 1/8" 7'-6 1/2" 5'-8 15/16" 3'-9 5/16" 13'-3" 1" 7' 1'-3 1/2" 30 Ton 24'-1 3/8" 5'-8 5/8" 7'-6 1/2" 6'-2 3/8" 4'-9 5/16" 13'-3" 1" 7' 1'-3 1/2" 40 Ton 30'-2 1/2" 6'-1 5/8" 7'-6 1/2" 6'-7 3/8" 5'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 50 & 55 Ton 32'-10 1/2" 5'-3 1/8" 7'-6 1/2" 5'-8 7/8" 6'-9 5/16" 15'-11 1/8" 1" 8' 2'-5" 60 Ton 30'-2 1/2" 6'-1 5/8" 9'-8" 6'-7 3/8" 5'-9 5/16" 1
