EMI WLHA - Manual (Page 8)

www.enviromaster.com WLCA/WLHA High Wall Evaporator 8
LoW VoLt intErConnECt WirinG for Unit moUntEd ControLs
remote thermostat Controls
Heat pump Connection
Unit mount Controls
Two-Stage Heating
When connecting to a defrosting heat
pump, such as EMI model S1HA, indoor
units with electric heat utilize five intercon-
necting low Volt wires between the indoor
and outdoor units.
Units With or Without Heat c
ontinued
Low
Volt interconnect diagram intercon-
nect diagram Figure 1A and Figure 1B
for unit mounted controls.
the 24V control transformer is
located in the air handler unit. This
provides low Volt control power to
both the air handler and condenser.
Depending on the models selected,
the interconnect control wiring may
be effected.
notE:
All low Volt interconnect
wiring must be at least 18 awg.
Figure 2 A
Figure 1A
Not used
Figure 1B
Not used
Unit mount Controls
Straight Cool
Choosing a remote Wall mounted
thermostat: See “Wall Thermostat
Control” section page 21.
notE:
For remote thermostat mode
the key pad will have limited opera-
tion - Sequence of Operation - Wall
Mounted Thermostat, page 21.
WLCA/WLHA HiGH WALL EVAporAtor instALLAtion instrUCtions