Typical Gsr21 Horizontal Installation* - Lennox G21Q3-40 Unit Information

WASHER AND 2 NUTS
RAFTERS
BRACED FOR
SUPPORT
SUPPORT
ROD
LAG
SCREW
SUPPLY
FLEXIBLE BOOT
IN RETURN DUCT
(NOT NEEDED
WITH FLEX DUCT)
DRAIN PAN
*INSTALLATION PROCEDURES OUTLINED IN THIS MANUAL ARE
PRESENTED AS RECOMMENDATION ONLY AND DO NOT SUPERSEDE
OR REPLACE LOCAL OR STATE CODE. IF LOCAL OR STATE CODES
DO
NOT EXIST, THE PROCEDURES OUTLINED IN THIS MANUAL ARE
RECOMMENDED ONLY AND DO NOT CONSTITUTE CODE.
**ALL G21/GSR21 80/100 UNITS REQUIRE THE USE OF MUFFLERS.
MUFFLERS ARE RECOMMENDED OPTIONS ON ALL OTHER UNITS.

TYPICAL GSR21 HORIZONTAL INSTALLATION*

INTAKE PIPE
(2" PVC)
MUFFLER**
REDUCER
COUPLING
CONTROL
ACCESS PANEL
DRAIN VENT
SERVICE
PLATFORM
FIGURE 42
Page 37
When viewing unit from front, circu
lating air blower compartment must
be located to the right.
EXHAUST PIPE (2" PVC)
MUFFLER**
MAIN SHUT OFF VALVE
DRIP LEG
GAS CONNECTOR
BLOWER
ACCESS PANEL
CONDENSATE TRAP
ISOMODE PADS(4)
SUPPORT FRAME
SUPPORT FRAME
MANUAL
RETURN
FLEXIBLE BOOT
IN RETURN DUCT
(NOT NEEDED
WITH FLEX DUCT)