VII. STEP 7 — MAKE ELECTRICAL CONNECTIONS
WARNING: Unit cabinet must have an uninter- rupted, unbroken electrical ground to minimize the possi- bility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accor- dance with NEC (National Electrical Code), ANSI/NFPA, latest edition, and local electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in the installer being liable for per- sonal injury of others.
A. Field Power Supply
All units except
Refer to unit label diagram for additional information. Pigtails are provided for field wire connections. Use factory- supplied splices or UL (Underwriters’ Laboratories) approved copper/aluminum connector.
When installing units, provide a disconnect per the NEC.
All field wiring must comply with NEC and local require- ments.
Install field wiring as follows:
1.Install conduit through side panel openings. Install conduit between disconnect and control box.
2.Install power lines to terminal connections as shown in Fig. 9.
Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (see Tables 2A and 2B). On
B. Field Control Wiring
Install a
Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to
NOTE: For wire runs up 50 ft, use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over
BLOWER
ACCESS
PANEL
Fig. 7 — Flue Hood Details
LEGEND
NFGC — National Fuel Gas Code *Field supplied.
NOTE: Follow all local codes.
SPACING OF SUPPORTS
STEEL PIPE | X |
NOMINAL DIAMETER | DIMENSION |
(in.) | (feet) |
1/ | 6 |
2 |
|
3/ or 1 | 8 |
4 |
|
11/ or larger | 10 |
4 |
|
Fig. 8 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.
Pass the control wires through the hole provided in the cor- ner post; then feed wires through the raceway built into the corner post to the
C. Heat Anticipator Settings
Set heat anticipator settings at .14 amp for the first stage and .14 amp for