16
18-GF81D1-1A-EN
HHeeaattiinngg ((eelleeccttrriicc hheeaatt oonnllyy))
NNoottee:: The thermostat must be setup to bring the
blower on when the electric heat is energized.
When the thermostat calls for heating, the circuit
from R to G is completed and the blower motor is
energized directly by the 24VAC signal from the
thermostat.
Completing the circuit from R to W (or R to W1 if
configured for two-stages of electric heat) energizes
the black wire to the blower motor and activates
high-stage airflow.
Completing the circuit from R to W2 directly
energizes the blower motor by the 24VAC signal
from the thermostat.
Completing the circuit from R to W energizes the
heating contactor(s).
DDeeffrroosstt
Supplemental heat during defrost can be provided
by connecting the X2 (black) wire from the outdoor
unit to W1 or W2 at the indoor unit. This will
prevent cold air from being discharged from the
indoor unit during defrost.
13. OOppeerraattiioonnaall aanndd CChheecckkoouutt PPrroocceedduurreess
To ensure proper function of the Refrigerant Leak
Detection System, all procedures in the
“Refrigerant Leak Detection System,” p. 10 section
of this manual must be verified.
To obtain proper performance, all units must be
operated and charge adjustments made in
accordance with procedures found in the Service
Facts document of the outdoor unit.
After installation has been completed, it is
recommended that the entire system be checked
against the checkout list located at the back of this
document. See “Checkout Procedures,” p. 32.
14. MMaaiinntteennaannccee
The system air filter(s) should be inspected, cleaned
or replaced at least monthly. Make certain that the
access panels are replaced and secured properly
before placing the unit back in operation. This
product is designed for dependable service;
however, periodic maintenance should be
scheduled and conducted by trained professional
service personnel. This service should be
conducted at least annually, and should include
testing and inspection of electrical and refrigerant
components. The heat transfer surface should be
cleaned. The blower motor is permanently
lubricated for normal operating conditions.
IInnssttaallllaattiioonn IInnssttrruuccttiioonnss
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