Form O-Y P/N 273647R5, Page 1
Form O-Y (4-16)
Operation / Maintenance / Service
R-410A
Refrigerant
A
G
E
N
C
Y
P
R
O
C
E
S
S
S
T
A
R
T
-
U
P
P
R
O
D
U
C
T
C
U
S
T
O
M
E
R
W
A
R
R
A
N
T
Y
C
O
N
V
E
R
G
E
N
T
Q
U
A
L
I
T
Y
S
Y
S
T
E
M
CQS
Applies to: Models YDHA, YDMA, and YDSA
Packaged Rooftop Equipment
DANGER
This unit contains R-410A high pressure refrigerant. Hazards exist that
could result in personal injury or death. Installation, maintenance, and
service should only be performed by an HVAC technician qualied in R-410A
refrigerant and using proper tools and equipment. Due to much higher
pressure of R-410A refrigerant, DO NOT USE service equipment or tools
designed for R22 refrigerant.
IMPORTANT: Do not release refrigerant to the atmosphere! If required
service procedures include the adding or removing of refrigerant, the service
technician must comply with all federal, state and local laws. The procedures
discussed in this manual should only be performed by a qualied HVAC
technician.
Model YDHA -
High Outside
Air (Conditioned
Ventilation)
Model YDMA -
Conditioned
Makeup Air
Model YDSA -
Space
Conditioning
Obsoletes Form O-Y (11-15)
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