Installation guide

1,WhentheroomtemperaturerisastoapointthatisslightlyabovethecoolingeuntTol s_g of the thermostat, the thermostat completes the
circuit bo_vecn thermostat t_mrhnal R to terminals Y mid G, These completed cira_ulmthrough the thermostat:
2, The nonually open eontaets of cnraglz_ eontac_rur (C) close and complcCmthe elxcult through compros_r motor (COMP) to eonden_r
(outdoor) fan motor (OFM), Both motors, start instantly.
3, The set of normally open eontacets of energized r_,lay BM close end eompletc the eircult through evaporator blawra (indoor) fen motor
(rF_t),
NOTE: Ounc the eomprassur has sturted oaadthen stopped, it should not be sturted again uatll 5 mlnutes have elapsed. The cooling cyalc remains
"on" tmtll the room temperature drops to a point that is slightly below the cooling control setting of the room thermostat. At this point, the
thermostat "breaks" the elrault bc_'_,ecn thermostat terminal R to _rmlmJs Y end G. These open circuits doenragize eontae'mr coil C. The eondeuscr
mad eomprossur motors, stop. Afire" a 30-see. delay, the blower motor stops. The unit is in a "standby" condition, woJting for the next "call fbr
cooling" fi'om the room thermostat.
MAINTENANCE
To ensure continuing high performance mad to minimize the possibility of pt_nnatuse equipment fMlum, periodic m0Jntenanec must be performed
on this equipment. This eombluatlon heatlng/cooling unit should be inspected at lcust once each year by a qualified set'dec person. To t_'oublashoot
cooling or heating of units, refer to Tables 16-18.
NOTE: Consult your local dealer about the availability ofa maintma0aaec cont:meL
UNIT SIZE
PYIP
018
024
030
036
042
048
060
Table 14_PY1PWet Coil Pressure Drop
AIRFLOW
(CFM)
500
600
700
700
600
900
900
1000
1100
1100
1200
1300
1300
1400
1500
1500
1600
1700
1900
2000
2100
PRESSURE DROP
0n. wG)
0.049
9.070
0.095
0.077
0.100
0.127
0.085
0.060
0.097
0.064
0.100
0.177
0.103
0.120
0.138
0.065
0.100
0.113
0.105
0.120
0.132
z_& WARNING: The ability to properly perform maintenance on this equipment requires certain expertise, mechanical
skills, tools, and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment other
than those procedures recommended in the User's Manual. FAILURE TO HEED THIS WARNING COULD RESULT IN SERIOUS
INJURY AND POSSIBLE DAMAGE TO THIS EQUIPMENT.
z_ WARNING: Failure to follow these warnings could result in serious injury:
1, First, turn Off gas supply to the unit, Then turn off electrical power to the unit and install lockout tag before performing any
maintenance or service on the unit.
2. Use extreme caution when removing panels and parts. As with any mechanical equipment, personal injury can result from sharp
edges, etc.
3. Never place anything combustible either on, or in contact with, the unit.
4. Should overheating occur or the gas supply fail to shut off, turn off external main manual gas valve to the unit. Then shut off electrical
supply and install lockout tag.
z_ CAUTION: Errors made when reconnecting wires may cause improper and dangerous operation. Label all wires prior
to disconnection when servicing,
The mJnlmum malnteaenec requirements fbr this cquigrncnt arc as follows:
_6--