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3.0
Installation
•
Wiring
The thermostat terminal designations are as follows:
R: 24 VAC Power
W: Call for Heat
C: Common for 24 VAC Power (if required for thermostat power)
24 VAC is supplied from an internal 40 VA transformer. DO NOT supply 24 V to the terminal strip.
Figure 2.2
Single Heater, Single Thermostat Connection
•
Controlling Multiple Heaters with a Single Control Device
When multiple heaters are operated by the same control device (for example, common vented heaters),
an external relay kit (Part #ERK) must be utilized per heater. This allows the heater's 24 V supply voltage
to be isolated from the external control voltage of the thermostats. The ERK is to be installed on or near
the heater. Follow the instructions that accompany the accessory for more information and wiring
diagrams.
Figure 2.3
Multiple Heaters, Single Thermostat Connection with External Relay Kit
•
THERMOSTAT
R
W
C
TRANSFORMER
L1
L2
Thermostat Location
The location of the thermostat should be determined by the desired heating requirements and be
mounted on an inside wall five (5) feet above the finished floor. Locate the thermostat in a conspicuous
location, away from where it could be influenced by heat from the unit or other sources, as this may
cause the unit to short cycle. Care should be given to locate the thermostat away from drafts or
frequently opened doors. To prevent drafts inside the wall from affecting the thermostat's performance,
plug hole for the wire with insulation or suitable caulk. For further information, see the accompanying
instructions with the thermostat.
HEATER
TERMINAL
OPTIONAL 24V COMMON
CHECK THERMOSTAT
INSTRUCTIONS TO SEE
IF NEEDED
RELAY BOX
P/N: ERK
(1 PER HEATER)
C
W
1/4" spade
terminals required
(as supplied)
HEATER
TERMINAL
RELAY BOX
P/N: ERK
(1 PER HEATER)
C
W
48
DX3L
Series
HEATER
TERMINAL
RELAY BOX
P/N: ERK
(1 PER HEATER)
C
W
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