23
LDAP-IOM (01-22) 207733-A
Double-wall or
Category III vent pipe
Reznor (option CC1) vent cap
Figure 12. Vertical Vent Terminal
Electrical Connections
⚠ CAUTION ⚠
• Route wires so that they do not contact the flue wrapper or venter housing.
• If any of the original wire supplied with the appliance must be replaced, it must be replaced with
wiring material having a temperature rating of at least 105°C except for limit control, high limit
control, and sensor lead wires, which must be rated at 150°C.
NOTE: Ensure that all wiring is in accordance with the wiring diagram provided with the unit.
•
All electrical wiring and connections, including electrical grounding MUST be made in accordance with the National
Electric Code ANSI/NFPA No . 70 (latest edition) . In addition, the installer should be aware of any local ordinances
or gas company requirements that might apply .
•
Check the rating plate on the heater for the supply voltage and current requirements . A dedicated line voltage
supply with a disconnect switch should be run directly from the main electrical panel to the heater .
•
All external wiring must be within approved conduit and have a minimum temperature rise rating of 60°C . Conduit
must be run so as not to interfere with the heater access panel .
•
Use #18 gauge wire for all wiring on the heater .
•
Line and fan motor branch wire sizes should be of a size to prevent voltage drops beyond 5% of supply line voltage .
•
The control transformer has a dual voltage primary . For 230V heaters, the black lead goes to the 240 terminal .
Cap the 208 terminal . For 208V heaters, the black lead goes to the 208 terminal . Cap the 240 terminal .
•
When providing or replacing fuses in the fusible disconnect switch, use dual elements time delay fuses and size
according to 1 .25 times the maximum total input amps .
•
The line side of the lockable disconnect switch must be connected to the incoming power supply such that the
voltage between terminal L1 and ground is the greater value .
