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Reznor APD Manual
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Reznor APD Manual

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RELAY KIT INSTALLATION FOR MULTIPLE HEATER CONTROL
OPTIONS CL31 AND CL32 FOR MODELS APD, F, B, LDAP, UBX, UBZ, UDAP, UDAS,
These relay kits are designed to permit the control of up to six heaters (one control unit and up to five additional non-
control units) with one single-stage thermostat or with a time clock and single or multiple single-stage thermostats.
For maximum safety, the multiple control is installed in the low voltage circuit. Interruption of the supply voltage is
not recommended.
Important Safety Information
• Refer to the installation manual provided with the heater for important safety information.
• Pay attention to all dangers, warnings, cautions, and notes highlighted in this manual. Safety markings should not
be ignored and are used frequently throughout to designate a degree or level of seriousness.
• DO NOT use these multiple heater control options with a two-stage gas valve or a two-stage
thermostat.
• These instructions are designed to assist a qualified electrician in installing this multiple heater
control kit.
• All electrical wiring and connections, including electrical grounding, MUST be in accordance with
the National Electric Code ANSI/NFPA No. 70 (latest edition) or, in Canada, with the Canadian
Electrical Code, Part 1, CSA Standard C22.1. In addition, the installation must comply with local
ordinances and applicable gas company requirements.
Applicability
Model/option/voltage applicability is listed in
Table 2
components listed in
Model
APD, UBX, UBZ, UDAP, UDAS,
UDBP, UDBS, UDX, UDZ
F. B, VR
LDAP
UEAS, UEZ
*
Except as follows: unit size 400 can have five (5) additional non-control units, unit size 800 can have three (3) additional non-control units,
and unit size 1200 can have two (2) additional non-control units.
UDBP, UDBS, UDX, UDZ, UEAS, UEZ, AND VR
GENERAL INFORMATION
⚠ CAUTION ⚠
Table 1
are available before beginning installation.
Table 1. Model/Option/Voltage Applicability
Voltage/Phase
115/1, 208/1, 230/1, 208/3, 230/3,
460/3, 575/3
115/1
208/1, 230/1, 208/3, 230/3, 460/3
575/3
208/1, 230/1
115/1
Revision: OPT-CL31-CL32 (11-21) 102247-A
Supersedes: I-OPT-MH (02-16) PN102247R8
and kit components are listed in
Option for
Control Unit
CL31
CL31
CL32
CL31
CL31
CL31
Table
2. Ensure that all
Option for
No. of Non-Control
Non-Control Unit(s)
Units Permitted
CL32
CL32
CL32
CL32
CL32
CL32
4
4
*
4
4

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Summary of Contents for Reznor APD

  • Page 1 Revision: OPT-CL31-CL32 (11-21) 102247-A Supersedes: I-OPT-MH (02-16) PN102247R8 RELAY KIT INSTALLATION FOR MULTIPLE HEATER CONTROL OPTIONS CL31 AND CL32 FOR MODELS APD, F, B, LDAP, UBX, UBZ, UDAP, UDAS, UDBP, UDBS, UDX, UDZ, UEAS, UEZ, AND VR GENERAL INFORMATION These relay kits are designed to permit the control of up to six heaters (one control unit and up to five additional non- control units) with one single-stage thermostat or with a time clock and single or multiple single-stage thermostats.
  • Page 2 Table 2. Relay Kit Components Option Item No. Component Description CL31 CL32 PN (Quantity) APD, UDAP, UDAS, UDX, UDZ, UEAS, and UEZ Models — Option package PN 197155 (1) 197156 (1) Relay assembly Includes relay and specially-designed bracket 197157 (2)

  • Page 3: Installation

    Figure a. Remove or open panel(s) as necessary and locate factory-installed transformer (see (1) For models APD, UDAP, UDAS, UDX, UDZ, UEAS, and UEZ, transformer is mounted on control board at bottom of control compartment. (2) For models F and B, remove left (when facing rear of heater) outer side panel to expose inner side panel and wiring.
  • Page 4 Install replacement transformer from kit (refer to Table (1) For models APD, UDAP, UDAS, UDX, UDZ, UEAS, UEZ, and VR, secure transformer (5) using same screws. (2) For models F and B, slide Tinnerman clips (2A) over transformer (5) and secure transformer using screws (2) from kit.
  • Page 5 SECONDARY HEATER for non-control unit—on wiring diagram label (4). b. Locate required wiring diagram label position on unit: (1) For models APD, APD, UBX, UBZ, UDAP, UDAS, UDBP, UDBS, UDX, UDZ, UEAS, and UEZ, label location is bottom rear corner of access panel.
  • Page 6 Specifications and illustrations subject to change without notice or incurring obligations. Latest version of this manual is available at www.reznorhvac.com. ©2021 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved. OPT-CL31-CL32 (11-21) 102247-A...

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