Enviro VB09-36, Установка, эксплуатация и обслуживание, Страница: 16 / 40

FORM ET145.18-IOM1 (115)
ENVIRO-TEC 16
FIGURE 5 – Remote Thermostat Wiring
E. Optional ADA Door Mounted Thermostat
For units ordered with ADA thermostat option to meet the
Americans with Disabilities Act’s (ADA) requirements,
thermostat is located on the return air panel door, at a height
of 48 inches from the base of the cabinet. Unit is supplied with
a custom return air door panel with thermostat mounting holes,
unit switch plate with molex connector, and ADA molex pigtail
harness. See Section 6, Figure 9A.
Wire leads from ADA thermostat harness are field wired to
thermostat terminals. Molex end of ADA thermostat harness is
field connected to surface mounted molex connector at unit
switch plate.
Mount thermostat using the factory provided 1/4” #8 screws.
ADA thermostat harness is plenum rated and will hang in
behind the return air door. For chassis servicing, unclip
harness from unit switch plate.
FIGURE 6 – Unit Switch Plate with ADA Thermostat Connection
F. ECM Continuous Fan
This option features a factory wired continuous low speed fan
circuit. The EC motor (ECM), due to available five motor speed
taps, offers ideal range for supporting continuous low speed
fan.
Fan will run continuously on low fan speed setting even if there
is no demand for cooling or heating. The continuous fan is
controlled by a dry contact to provide interlocking to ERV or
room occupancy control. See Appendix for electrical
schematics.
5. CLOSET & DRYWALL INSTALLATION
To avoid potential vibration and noise issues the
Return Air Panel should not contact any part of the
unit cabinet or sleeve. Maintain a sufficient gap
between R.A. Panel frame and cabinet!
1. Build a closet enclosure for the cabinet that will
incorporate the Return Air panel size while maintaining a
sufficient gap between the closet and cabinet to prevent
the cabinet from contacting the R.A. panel and closet
enclosure. Refer to Section 6 and Figures 7 & 8.
2. Before installing drywall around cabinet, cover the supply
and return openings with plastic or cardboard to prevent
dust or debris from entering the unit components.
3. Install drywall using conventional construction methods.
Studs or drywall should not be fastened directly to the
cabinet surface. The spacing of the framing members will
be dependent on the return air access and the type
/quantity of supply air outlets. See Figures 7 and 8.
4. Install sheetrock around unit cabinet by securing the
drywall to building construction studs. Cut holes around
the supply air and return air openings to allow access to
the unit chassis, unit controls, and the supply air
connection.
5. Vacuum all dust and construction debris from the unit
drain pan, electrical box, and discharge plenum, after
cutting out the supply/returns openings.
To prevent electrical shorts, and drain pan leaks,
DO NOT penetrate unit components when driving
screws near the unit control box or drain pan. Do
not allow screws or nails to penetrate chassis,
risers, electrical junction boxes, conduits, or to
interfere with chassis removal.
6. ACOUSTIC RETURN AIR PANEL
1. Return Air (R.A.) Panel is painted standard “Appliance
White”. Carefully unpack R.A. Panels from shipping box.
R.A. panels with optional key locks require key locks to
be field installed to the slot in panel door. ADA R.A. door
panels come with an opening and pilot holes mounting a
Johnson Controls thermostat. ADA harness for wiring to
thermostat and connecting to unit is shipped loose with
the thermostats.
2. Locate drywall opening at a distance from the unit that
prevents the R.A. panel from contacting the unit sleeve.
See Figure 7 & 8. R.A. panel throat opening should be
centered to the unit cabinet return air flange opening.
3. Fasten R.A. Panel to frame opening using screws
provided. See Figure 7.
4. Refer to Figure 9A showing opening for mounting ADA
compliant thermostat at 48” above floor. Note that
location of opening on door changes if cabinet is ordered
with stand. A left hand opening door is shown. R.A Panel
with ADA is not reversible and must be ordered in either
Left or Right hand opening configuration, determined by
location of door hinge.
Optional
Disconnect
Optional
ADA Molex
Connection