Carrier Weathermaster 48P2030-100 - Page 152

152
COMPRESSORS
Sizes 030,035
Access to the compressors is below the unit control box.
Sizes 040-060
Access to the compressors is through the doors on the condens-
er end of the unit. This door also provides access to the dis-
charge service valves, filter driers, the crankcase heaters, and
the high-pressure and low-pressure switches. Circuit A is al-
ways the compressor on the left when facing main control box.
Sizes 070-100
Each compressor is readily accessible from sides of unit.
LIQUID SERVICE VALVES, SUCTION SERVICE VALVES,
AND SIGHT GLASSES
Sizes 030-060
Access to these components is through the access panel on the
right side of the unit. See Fig. 39. There is also a Schrader port
in each suction line that is accessible through this same panel.
Fig. 39 — Typical Filter Drier and Liquid Service
Valve Access
Sizes 070-100
Access to these components is from the side of the unit.
SUPPLY-FAN MOTORS, PULLEYS, AND BELTS
Access to these components is through the two doors labeled
FAN SECTION on each side of the unit.
POWER EXHAUST MOTORS, PULLEYS, AND BELTS
Access to these components is through the door below the side
economizer hoods on both sides of the unit. See Fig. 40.
Fig. 40 — Modulating Power Exhaust
Motor Access (Both Sides)
RETURN AIR FILTERS
Access to these filters is through the door marked FILTER
SECTION.
UNIT CONTROL BOX
Access to this component is through the doors marked ELEC-
TRICAL SECTION on the condenser end of the unit.
GAS HEAT SECTION (48P ONLY)
Access to the gas heat section is through the door labeled
HEAT SECTION on the right side of the unit (when facing re-
turn air end). Figures 41-43 show the gas system components
for 2-stage heat and staged gas heat. Figure 44 shows the com-
ponents of a typical modulating gas heat section. For modulat-
ing heat units, Fig. 44 replaces section 2 in Fig. 41-43.
Fig. 41 — Gas Section Detail, Sizes 030-050
Fig. 42 — Gas Section Detail, Sizes 055-100
(Low Heat)
NOTE: High heat consists of sections 1 and 2. Low heat consists of
section 1 only.
LIMIT
SWITCH
NO. 1
SECTION 1
SECTION 2
LIMIT
SWITCH
NO. 2
GAS VALVE
GAS VALVE
FLUE
OUTLET
FLUE
OUTLET
GAS VALVE
FLUE
OUTLET
LIMIT
SWITCH
NO. 1
SECTION 1
SECTION 2
LIMIT
SWITCH
NO. 2
FLUE
OUTLET
GAS VALVE