40MBAB: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
15
Triple Evacuation Method
The triple evacuation method should be used when vacuum pump is not
capable of pumping down to 500 microns and system does not contain
any liquid water. Refer to Fig. 42 and proceed as follows:
1. Attach refrigeration gauges and evacuate system down to 28 in. of
mercury and allow pump to continue operating for an additional 15
minutes.
2. Close service valves and shut off vacuum pump.
3. Connect a nitrogen cylinder and regulator to system and flow
nitrogen until system pressure is 2 psig.
4. Close service valve and allow system to stand for 1 hour. During this
time, dry nitrogen can diffuse throughout the system absorbing
moisture.
5. Repeat this procedure as indicated in Fig. 42. The system should
now be free of any contaminants and water vapor.
A220818
Fig. 42 —Triple Evacuation Method
Final Tubing Check
Check to be certain factory tubing on both the indoor and outdoor unit has
not shifted during shipment. Ensure tubes are not rubbing against each
other or any sheet metal. Pay close attention to the feeder tubes, making
sure wire ties on feeder tubes are secure and tight.
Step 8 - Mount Electric Heater (Optional)
Heater Kits
This unit is not equipped with an electric heater package. A factory-approved,
field-installed, ETL listed heater package is available from your equipment
supplier. Factory-authorized, field-installed electric heater packages are available
in sizes 5kW through 25kW. Electric heaters that are not factory approved may
cause damage which would not be covered under the equipment warranty. Review
the product data literature for all available accessory kits.
Table 8 — Accessories
NOTE: Installation must be performed by an authorized dealer or
specialist. Use recommended PPE when installing the unit.
Specification of electric auxiliary heat modules: 5kW, 8kW, 10kW, 15kW,
20kW, 25kW.
Table 9 — Auxiliary Heater Compatibility
Table 10 — Power Requirements for Heaters
NOTE: The EHKMA series of heaters is NOT compatible with the
40MBAB air handler.
If the unit needs to be equipped with the electric auxiliary heat module, check
the electric auxiliary heat module specification that is compatible with the
unit to avoid unnecessary consequences caused by improper matching and
refer to Product Data Manual.
INSTALLATION REQUIREMENTS
NOTE: Installation of Auxiliary Electric Heat Module should be
completed before installing the discharge ductwork to
insure proper alignment of the inside support brackets.
Before installation, check the list of electric auxiliary heat modules and
physical objects. After transportation, check whether the electric heat
module is damaged. If any damage is detected, contact the after-sales
personnel immediately.
NOTE: A separate power source is required for an Auxiliary Electric
Heater. These units do NOT support a SINGLE POINT
electrical connection when utilizing auxiliary heat.
Name Shape Quantity
Owner’s and Installation Manual 1
Seal 1
Screw 7
Electric Auxiliary Heating
Wiring Diagram
1
Circuit Breaker Label 1
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
RELEASE CHARGE INTO SYSTEM
BREAK VACUUM WITH DRY NITROGEN
EVACUATE
WAIT
MODEL (Btu/h) 5kW 8kW 10kW 15kW 20kW 25kW
18K YYY - - -
24K YYYY - -
30K YYYY - -
36K YYYYY -
48K - YYYY -
60K - - YYYY
Heater
Kit Size
(KW)
Model
Number
MCA
Circuit
1 208V/
230V
MCA
Circuit
2 208V/
230V
MCA
Circuit
3 208V/
230V
MOPD
Circuit
1 208V/
230V
MOPD
Circuit
2 208V/
230V
5
EHKMB0
5KN
23.0/
27.0
25.0/
30.0
8
EHKMB0
8KN
37.0/
42.0
40.0/
45.0
10
EHKMB1
0KN
46.0/
53.0
50.0/
60.0
15
EHKMB1
5KN
23.0/
27.0
46.0/
53.0
25.0/
30.0
50.0/
60.0
20
EHKMB2
0KN
46.0/
53.0
46.0/
53.0
50.0/
60.0
50.0/
60.0
25
EHKMB2
5KN
23.0/
27.0
46.0/
53.0
46.0/
53.0
25.0/
30.0
50.0/
60.0
This electric auxiliary heat module is internally mounted in the air
handler. DO NOT mount in the ductwork.
CAUTION
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