OHP Installation Manual

1716
OHP Series
2.0 Installation • Electrical Requirements
Electrical Requirements
All field wiring to the patio heater must be done in accordance with the national, state, provincial and local
codes, and the guidelines in this manual. In the United States, refer to the most current revisions to the
Electrical Code ANSI/NFPA 70 and in Canada refer to the most current revisions of the Canadian Electrical
Code CSA C22.1 Part 1. The unit must be electrically grounded according to these codes.
This patio heater system is designed to operate on an external 24VAC electrical system. Provide only
24VAC with a NEC Class 2 transformer to the control wires inside the controls compartment. Use at least
18 AWG solid core thermostat type wire that has an adequate capacity and temperature rating for the total
load. Never locate the transformer inside the controls compartment.
Installing the control wire
Each heater includes a rubber grommet to allow
for control wire to be brought into the unit with a
water resistant seal. Feed the control wire through
the grommet, piercing the rubber with the wire.
Ensure enough wire length is available to make
the proper connections. Tie the control wire into
a loose knot, as shown in Figure 2.6. Ensure knot
is loose enough to not cause any damage to the
wire. This will allow for a strain relief for the
connections to the heater.
Wiring: From the control wire, connect the
24VAC to the blue wire (labeled “24VAC”) inside
the control compartment. Then connect the
Common from the control wire to the green wire
(labeled “Common”). See Fig 2.8 on page 18.
Controls Operation
This patio heater was designed for use in an outdoor environment. Therefore, controlling the heater by use
of a thermostat may not be the best means of temperature control. In an outdoor application, the air
temperature may not increase and never satisfy the thermostat. The preferred control device when operating
this heater in an outdoor area is a switching or timer device.
In an application where there are several wind breaks or a partially enclosed area, a thermostat can be
used.
NOTICE
The power supply to the heater must be within +/-5% of the voltage rating as indicated on the rating plate
of the appliance. If input power does not meet these specifications, contact your utility company.
WARNING
!
Incorrect or improper wiring may result in shock, injury, or death. Field wiring to the heater
must be connected and grounded in accordance with national, state, provincial and local
codes, and to the guidelines in this manual. Refer to the most current revisions to the ANSI/
NFPA 70 Standard.
Figure 2.6 • Control Wire Installation
Loose Knot in
Control Wire
Control Wire
Connections