Instructions / Assembly

Page 37 mrcool.com
Outdoor Unit Installation
Step 5: Opening Refrigerant Valves
In this step you will be opening the refrigerant
valves & king valves (multi-zone condenser only) of
the outdoor unit. This will release refrigerant from
the pre-charged line set into the whole system.
1. Using the images below as a guide, remove the
cover on the top valve, using a 19 mm
open-ended wrench or a crescent (adjustable-
type) wrench. Then, insert a 5 mm Allen key and
open the valve by turning it counter-clockwise as
far as it will go. DO NOT force it. The valve is
now open. Screw the cover back onto the top
valve and tighten it well to ensure that it is
properly sealed.
2. Now, you will repeat the same process for the
bottom valve. Remove the cover on the bottom
valve, using a 19 mm open-ended wrench or a
crescent (adjustable-type) wrench. Then, insert a
5 mm Allen key and open the valve by turning it
counter-clockwise as far as it will go. DO NOT
force it. Screw the cover back onto the bottom
valve and tighten it well to ensure that it is
properly sealed. NOTE: if your installation is
a multi-zone system, continue this process
for all of the line sets connected to the
condenser until all of the refrigerant valves
are fully opened.
All of these steps must be completed BEFORE
powering the unit. Otherwise, it could cause
system damage and/or complete system
failure.
CAUTION
NOTE: The step below only applies to units
being installed with a 3, 4, or 5-zone multi-zone
condenser. If you are installing the one-way
cassette with a single-zone or a two-zone
multi-zone condenser please skip to the next
step.
3. After opening all of the line set connection valves,
you must also open the two main valves (King
Valves), as shown in the images below. To do this,
first unscrew the caps from the valves in a
counter-clockwise direction using an appropriately
sized wrench, or crescent (adjustable-type)
wrench. Then, insert a 5 mm Allen key and open
each of the valves by turning them
counter-clockwise as far as they will go. DO NOT
force it. Then, reinstall the caps and tighten them
securely to ensure that they are properly sealed.
King
Valves