Reznor LDAP Unit Installation Manual - Manual (Page 7)

Form I-LDAP, P/N 207733R6, Page 7
Instructions for
Changing Heat
section Pressure
Switch(es)
NOTE: Do not change
the main pressure
switch located on top
of a Size 800 and Size
1200 heater. It is the
same for all elevations.
4.0 Clearances
and
Dimensions
FIGURE 3A - Model LDAP 400
NOTE: If an optional
nozzle is added to the
discharge opening, see
dimensions on page 16.
4.2 Dimensions -
Model
LDAP 400
Top
View
Bottom
View
Front
View
Right Side View
17-1/8”
(435mm)
30” (762mm)
14-7/8”
(378mm)
9-1/8”
(232mm)
15-1/4”
(384mm)
34-3/8” (873mm)
Hanger Location
1/2-13 Female Thread
28-1/8”
(714mm)
Air
Destratification
Fan Control
7/8” (22mm)
2-1/8” (54mm)
23”
584mm)
3-1/4”
(83mm)
5-5/8”
(143mm)
23”
(584mm)
Discharge Opening
43-1/2” (1105mm)
9-7/8”
(251mm)
5”
(127mm)
2-5/8”
(67mm)
13-1/8”
(333mm)
Line Voltage Connection
Disconnect Switch
1” NPT Gas Connection
38”
965mm)
1-1/4”
(32mm)
48-1/2”
(1232mm)
9-1/4” (235mm) Thermostat
Connection
6” Flue
Outlet
4.1 Clearances
Heaters must be installed so that the clearances in the table are provided for
combustion air space, inspection and service, and for proper spacing from
combustible construction. Clearance to combustibles is defined as the mini-
mum distance from the heater to a surface or object that is necessary to ensure
that a surface temperature of 90°F above the surrounding ambient tempera-
ture is not exceeded.
Clearances
Size
Top
Flue
Connector
Front (Access
Panel)
Rear
Disconnect
Side
Side Bottom
inches mm inches mm inches mm inches mm inches mm inches mm inches mm
400 12 305 6 152.4 18 457 2 50.8 18 457 2 50.8 60 1524
800 12 305 6 152.4 18 457 2 50.8 18 457 2 50.8 60 1524
1200 12 305 6 152.4 18 457 2 50.8 18 457 2 50.8 60 1524
1. In the control compartment of the first heat section, locate the pressure
switch.
2. Mark and disconnect the two wires attached to the pressure switch.
3. Mark and disconnect the sensing tubes from the pressure switch.
4. Locate the two screws holding the switch mounting bracket. Remove the
screws (save screws) and the pressure switch.
5. Using the same screws, install the high altitude pressure switch. Attach the
sensing tubes and wires.
6. If installing a Model LDAP 400, the pressure switch change for high altitude
is complete. If installing a Model LDAP 800, repeat Steps 1-5 to change
the pressure switch on the second heat section. If installing a Model LDAP
1200, repeat Steps 1-5 to change the pressure switches on the second
and third heat sections.