OPTIONAL BLOWER INSTALLATION INSTRUCTIONS
GWTB-2 FOR MODELS
GWT-25 (SG, RB), GWT-35 (SG, RB), GWT-50 (SG, RB)
Installing Blower Using Three-Prong Plug
1.Install furnace according to Installation Instructions and Owner's Manual.
2.Refer to Drawing for measurements to locate (2) mounting holes on wall surface above furnace.
On Solid Wall
3.After locating mounting holes, attach (2) #10 x 1 1/2" screws provided in blower kit into wall. Do not completely tighten screwheads to wall,
leave a 7/16" gap between screwheads and wall.
On Sheet Rock Wall
3.After locating mounting holes, drill (2) 5/16" diameter holes into wall. Insert the (2) plastic expansion anchors into holes. Insert (2) #10 x 1 1/2" screws provided in blower kit into (2) plastic expansion anchors. Do not completely tighten screwhead to plastic expansion anchors, leave a 7/16" gap between screwheads and plastic expansion anchors. Refer to Figure 2.
4.At the top of outer casing remove (1) screw from center clearance hole that attaches outer casing to header assembly. Also, remove (2) screws that attach bottom of outer casing to inner casing.
5.Pull the outer casing forward approximately 1 inch away from wall surface.
6.Remove (4) 8 x 3/8" screws that attach blower front to blower housing.
Caution: When removing blower front be careful not to damage motor coil wires. Damaged coil wires will disable blower function.
7.Position blower housing on top of header assembly and route three- prong cord set between left side of outer casing and inner casing.
Caution: Blower cord set routing is important. Cord set should be in proper location to avoid being overheated. Incorrect routing of cord set may result in damage to cord set.
8.Replace the outer casing to the wall surface.
9.Attachoutercasingtoheaderassembly. Attention:Thecenterclearance hole will not be used. The two outside clearance holes will be used to attach outer casing to header assembly, (1) screw from Step 4 and
(1) screw supplied in hardware package. Refer to Figure 1.
Caution: When installing blower housing onto wall be careful motor coil is not damaged.
Installing Blower With Hard Wiring
1.When facing the wall opening, install 120V electrical outlet junction box inside wall opening on left wall stud approximately 12 inches above header plate.
2.Refer to Drawing for measurements to locate access hole for electrical wiring on wall surface.
3.After locating access hole, drill a 1/2" hole into wall.
4.Route enough field wiring from 120V electrical outlet junction box through 1/2" access hole in wall for connection to blower housing.
5.Install furnace according to Installation Instructions and Owner's Manual.
6.Refer to Drawing for measurements to locate (2) mounting holes on wall surface above the furnace.
On Solid Wall
7.After locating mounting holes, attach (2) #10 x 1 1/2" screws provided in blower kit into wall. Do not completely tighten screwheads to wall,
leave a 7/16" gap between screwheads and wall.
On Sheet Rock Wall
7.After locating mounting holes, drill (2) 5/16" diameter holes into wall. Insert (2) plastic expansion anchors into holes. Insert (2) #10 x 1 1/2" screws provided in blower kit into (2) plastic expansion anchors. Do not completely tighten screwhead to plastic expansion anchors, leave a 7/16" gap between screwheads and plastic expansion anchors. Refer to Figure 2.
Figure 1
10.Attach outer casing to inner casing with (2) screws from Step 4.
11.Align key hole slots on back of blower housing with the (2) screws attached to wall. Position blower housing flush with wall surface and on top of outer casing. Complete tightening blower housing screws from Step 3 to wall.
12.Attach caps and plugs from blower housing and blower front.
13.Attach blower front to blower housing with (4) 8 x 3/8" screws from Step 6.
14.Installation of optional blower assembly is completed.
Page 18
Figure 2
8.Remove three prong cord set from blower housing.
9.Remove (4) 8 x 3/8" screws that attach blower front to blower housing.
10.Position blower housing on top of header assembly.
11.Route 120V field wiring into blower housing through cord set hole on back of blower housing.
12.Refer to wiring diagram to make wiring connections inside blower housing. Be sure to follow all local and National electrical codes when making field wiring connections.
13.Align key hole slots on back of blower housing with (2) screws attached to wall. Position blower housing flush with wall surface and on top of outer casing. Complete tightening blower housing screws from Step 7 to wall.
14.Attach caps and plugs from blower housing and blower front.
15.Attach blower front to blower housing with (4) 8 x 3/8" screws from Step 9.
16.Installation of optional blower assembly is completed.
