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ELECTRIC SHOCK HAZARD. Be sure electricity is
turned off at main switch first before wiring. Any
installation involving electric heaters must be
effectively grounded in accordance with the Na-
tional Electrical Code to eliminate shock hazard.
1. Use heater only on the voltage and frequency
specified on the nameplate.
2. All wiring should be done in accordance with local
codes and the National Electrical Code by a quali-
fied person as defined in the NEC.
3. Two knockouts are provided on the back of the
heater for wire entry. See Fig. 4 for location of
knockouts.
4. Branch circuit wire for connection to heater must
be at least 60˚C wire.
5. The bottom access door is hinged. There are two
screws that must be removed to gain access (Fig. 3).
6. A ground wire or ground lug is provided near the
power connection point (ground Wire on HVH-02
to HVH-20 and ground lug on HVH-25 to HVH-50).
7. Terminals on contactor or on line voltage terminal
block are supplied to be connected to accept the
correct size power supply wire. Copper rated at 600V
and 60˚C is satisfactory for the heater branch circuit.
8. Electrical accessories, either kits or factory-in-
stalled options, are shown connected by a dash
line on the heater wiring diagram.
9. Wiring connections are to be made on designated
wire leads as shown in the wiring diagrams located
inside the access door.
10. Louver adjustment (Do not attempt to adjust while
heater is operational): Louvers have been preset at
factory with the minimum open angle. Decreasing
the 45˚ angle may result in high temperatures and
functioning of the over temperature control. To in-
crease the opening angle, grasp the left end of louver
with the left hand using the index finger and thumb.
Grasp right end of louver with right hand in the same
manner. Twist louver to the desired position.
45˚ Min.
All Louvers
Figure 7 - Louver Adjustment
Top of Heater
POWER DISCONNECT SWITCH
(Available as a kit or factory installed option). This
switch disconnects the power to the power leads when
the handle is turned to its off position. Refer to Instruc-
tion Sheet PF207.
1. Use copper conductor supply wire only when con-
necting to the power line. (See Figure 8.)
2. Connection to the switch pigtails should be made
with compression connectors and the joint should
be then well insulated.
3. Consult the local wiring code in your area.
SUMMER FAN SWITCH - Refer to Instruction sheet
PF205 without relay, PF206 with relay.
(MOUNTED ON FRONT OF HEATER). When the switch
handle is pointing toward the Summer (Fan ON) position,
the fan will run continuously. When the switch handle is
pointing toward the WINTER (HEAT) position, the fan will
run only when the heating elements are hot.
REMOTE SUMMER FAN SWITCH
(MANUAL SWITCH-LINE VOLTAGE). The wall switch
is packed in the wiring compartment. The remote fan
switch is mounted external and remote from the HVH
unit heater. The voltage of the remote fan switch is the
same as the supply voltage to the HVH heater.
1. Use 14 gauge copper, NEC Class 1, 600V rated in-
sulated wire. Wiring must meet all Local and NEC
requirements for 480-volt service.
2. Install the remote fan switch in standard wall box in
any convenient location that is protected from traffic
or other accidental damage.
3. Connect the 14 gauge copper field wire to the switch
lead wires with suitable connectors.
Power
Disconnect
Switch
L1
To
L2
Power
Supply
L3
See
Note 2
Notes:
1. This illustration shows wiring hook up for three phase service. Remove lead
wires marked L3 and S3 when using single phase power service.
2. For units without contactors, disconnect switch is to be wired to terminal block
on heater power.
3. Use copper supply wire only with this switch.
Figure 8 - Power Disconnect Switch Wiring Diagram
8
Contactor
or Terminal
Block
S1
S2
See Notes
S3
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