Carrier Weathermaster 48P2030-100 - Page 153

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Fig. 43 — Gas Section Detail, Sizes 055-100
(High Heat)
Fig. 44 — Gas Section Detail, Modulating Gas Heat
MAIN BURNERS (48P ONLY)
At the beginning of each heating season, inspect for deteriora-
tion due to corrosion or other causes. The main burner assem-
bly is shown in Fig. 45 for 2-stage heat and staged gas heat. For
modulating gas heat, see Fig. 46. Refer to Main Burners Re-
moval and Replacement section on page 177 for burner remov-
al sequence. Observe the main burner flames and adjust if nec-
essary. See Gas System Adjustment section on page 177.
Fig. 45 — Burner Section Detail — 2-Stage
and Staged Gas Units
Fig. 46 — Burner Section Detail — Modulating Gas
Units
FLUE GAS PASSAGEWAYS (48P ONLY)
The flue collector box and heat exchanger cells may be in-
spected by removing heat exchanger access panel, flue box
cover, and main burner assembly (Fig. 45 and 46). If cleaning
is required, remove heat exchanger baffles and clean tubes with
a wire brush.
Use caution with ceramic heat exchanger baffles. When install-
ing retaining clip, be sure the center leg of the clip extends in-
ward toward baffle. See Fig. 47.
GAS VALVE
FLUE
OUTLET
LIMIT
SWITCH
NO. 1
SECTION 1
LIMIT
SWITCH
NO. 2
SECTION 2
FLUE
OUTLET
GAS VALVE
SECTION 3
FLUE
OUTLET
GAS VALVE
FLUE
OUTLET
GAS
VALVE
PRESSURE
FITTING
(SEE DETAIL A)
MODULATING
GAS
VALVE
FLUE
BOX
COVER
PRESSURE
TUBING
PRESSURE
SWITCH
DETAIL A
FLUE
BOX
COVER
PRESSURE
FITTING
GAS VALVE
ROLLOUT
SWITCH
SPUD
0.50±.03
RING GAP
LOCATION
0.120/0.140
BURNER