Rinnai 37AHB SERIES - Manual (Page 14)

14 Rinnai Corporation Hydronic Furnace (37AHB) Manual
Before installing or servicing system, always turn off
all power to system. There may be more than 1
disconnect switch. Electrical shock can cause
personal injury or death.
ELECTRICAL CONNECTIONS
Line-Voltage Connections:
U.S. INSTALLATIONS: Make all electrical connections
in accordance with National Electrical Code (NEC)
ANSI/NFPA 70 and all local codes or ordinances
having jurisdiction.
CANADIAN INSTALLATIONS: Make all electrical
connections in accordance with Canadian Electrical
Code CSA C22.1 and all authorities having
jurisdiction.
Check all factory wiring per unit wiring diagram and
inspect factory wiring connections to be sure none
were loosened in transit.
NOTE: Prior to making any electrical connections,
ensure that supply voltage, frequency, and phase are
as specified on unit rating plate.
Check to ensure that the existing electrical service is
adequate to handle the additional load imposed by the
Hydronic Furnace. Refer to unit wiring diagram for
proper electrical connections.
All electrical connections MUST comply with NEC and
any other local codes or ordinances having
jurisdiction. USE COPPER WIRE ONLY. Provide
separate branch electric circuit with field supplied
disconnect switch.
Location of disconnect switch to be in clear site,
accessible and in close proximity to the unit.
Correct polarity MUST be maintained for 115 V wiring.
If polarity is incorrect unit will NOT operate.
Control Box Relocation:
The Control Box is factory installed in the blower
compartment upper left corner (see Figure 12); if
factory location of Control Box is suitable, proceed to
next section. To relocate the Control Box to an
alternate location (blower compartment upper right
side) follow steps 1 thru 7 below:
1. Remove and keep one screw and cover from the
Control Box.
2. Remove and keep two screws holding Control Box
to casing of 37AHB unit (See Fig. 12.).
3. Remove wire tie from looped wires attached to
Control Box.
4. Before Control Box is reinstalled, remove the
scored piece of insulation from the desired side.
Remove two knockouts in the casing where the
Control Box is to be installed.
5. Secure Control Box to casing with the two screws
removed and kept from Step 2.
6. Reinstall two plastic plugs (from spare parts bag)
where indicated in openings on adjacent side of
Control Box.
7. Route Control Box wiring within unit away from hot
surfaces, sharp edges and rotating parts.
CAUTION
If a disconnect switch is to be mounted on the unit,
select a location where a drill or fastener will not be in
contact with electrical or hydronic components.
Electrical shock can cause personal injury or death.
Installation
Do NOT remove ground screw inside control box.
WARNING
Figure 12: Control Box Relocation
WARNING