18
Marvair Wall Mount Heat Pump I&O Manual
11/2021 New
Accessories:
The package may include other factory-supplied items (optional ) listed on this and the following page:
PART # DESCRIPTION
50107 Digital thermostat. 2 stage heat, 2 stage cool. 7 day programmable. Fan switch: Auto & On.
Auto-change over. Status LED’s. Backlit display. Programmable fan. Non-volatile program
memory. Title 24 compliant - no batteries needed.
50248 Digital, 7 day, 2 occupied & 2 unoccupied periods for each day of the week programmable
thermostat. Three stage heat/Three stage cool. Manual or auto changeover. Fan: Auto & On.
Ten year retention of programming settings and 48 hour clock and day settings on power loss.
Adjustable max. setpoint for heating and min. adjustable setpoints for cooling. Adjustable
temperature differential. Keypad lockout. Status LED. °F or °C selectable. Optional remote
sensors for outdoor air, supply air and humidity. Title 24 compliant.
51731 Humidity Controller is a wall mounted remote control used when the reheat dehumidification
option is chosen on the Heat Pump. The humidity controller controls the heat pump system
when cooling or heating requirements are satisfied, and the need exists to dehumidify the
conditioned space. When cooling or heating is required the thermostat controls the heat pump
system operation.
50092 Thermostat Guard. For use with the 50107 and the 50252.
Grilles:
Description
Size
Marvair P/N
For the MAA1042H/1048H/1060H & MAA2042H/2048H/2060H
Double Deflection, Aluminum Supply Grille
30” x 10“ (762mm x 254mm)
80676
Aluminum Return Grille
30” x 16” (762mm x 406mm)
80679
Return Filter Grille
30” x 16” (762mm x 406mm)
80673
Note:
Return filter grilles should be used when the 2” (51mm) filter in the MAA unit is not accessible from the exterior of the building. Filter
used in the return filter grille is a 1” (25mm) thick filter. The return filter grille is not recommended for use with the MAA heat pumps with
economizers.
Additional Items Needed:
Additional hardware and miscellaneous supplies (not furnished by Marvair
®
) are needed for installation.
For example, the list below contains approximate quantities of items typically needed for mounting a
unit on a wood frame wall structure with standard full length mounting bracket or flanges. Concrete or
fiberglass structures have different requirements.
(10)
3/8" mounting bolts
or lag screws for side brackets and anchors, if required for side brackets.
(20)
3/8" washers
(10)
3/8" hex nuts
(6)
3/8" x 2-1/2" lag screws
for bottom bracket
•
Silicone Sealer
to seal around cracks and openings
•
7-conductor low voltage multi-colored wire cable
(i.e. thermostat wire)
•
Appropriate electrical supplies
such as
conduit, electrical boxes, fittings, wire connectors,
etc.
•
High voltage wire
, sized to handle the MCA (minimum circuit ampacity) listed on the data plate.
•
Over-Current Protection Device
sized in accordance with the MFS (maximum fuse size) listed on
the unit data plate.
Duct materials usually are also needed in addition to the mounting hardware. To save time, design the
duct work before mounting the unit.
