Reznor VCT Unit Installation Manual - Manual (Page 7)

7
1.5 Electrical Connections
This appliance must be electrically grounded
Supply 120V 60Hz single phase.
Standard heater 0.16HP.
Current rating 1.2 amp max (inductive).
Fuse: external 3 amp.
Important: All electrical work should be done by a
qualified electrician in strict accordance with the
National Electrical Code ANSI/NFPA 70 or Canadian
Codes CSA C22.1.
The electrical supply to the
heater is by three wires: hot
(Live),
neutral and ground
connections.
Install in accordance with all
state & local codes.
Where alternative manufacturers
controls are used, please refer to
their
instructions for their
installation details.
Table 4 Gas Supply Pressures
Gas Type Natural Gas LP/Propane Gas
Required Gas Pressure (in W.C) 7.0 11.0
Maximum Supply Pressure (in W.C) 14.0 14.0
Gas Supply Connection ½” N.P.T thread
WARNING: Before making electrical
connections, switch OFF the main
electrical disconnect. There may be more
than one disconnect switch. Lock out
and tag switch with a suitable warning
label. Electrical shock can cause
personal injury or death.
Figure 5a. External Wiring Schematic. (VCT)
Notes:
Use 18/4 class 2 thermostat cable
between heater and thermostat.
Max. length @ 18 Awg (0.8mm²) =
100ft.
Only one burner can operate from
one thermostat as supplied.
When servicing heaters ensure the
electricity supply is isolated from the
mains supply.
120V AC supply is still present at
each burner when the thermostat is
switched off.
CONNECTOR MUST BE INSTALLED IN A “U” CONFIGURATION. FOR HEATERS
UPTO 150,000 BTU/H, A 24” LONG CONNECTOR OF AT LEAST ½” ID MUST BE
USED. FOR HEATERS ABOVE 150,000 BTU/H, A 36” LONG CONNECTOR OF AT
LEAST ¾” NOMINAL ID MUST BE USED.
F2
F1
R
C
W1
W2
24V AC
Terminals
(120V AC Fan
Terminals)
120V AC
Supply
24V AC 2-Stage
Thermostat (Ext.)
R C W1 W2
Burner 1
E
N
L
N
E
BL
BK
KEY:
BK-BLACK
BL-BLUE
R-RED
O-ORANGE
G-GREEN
W-WHITE
R
O
BK
G
W
VCS models can have an optional
24V AC single stage thermostat.
(See Fig. 5c overleaf)