HPS
Application
Manage Operating enevlope
Requirement
The solid line envelope is valid for a suction superheat within 5K (9°F) at nominal voltage. Higher suction
superheat may lead to discharge temperatures above 135°C for VCH115 with R410A.
Moreover, the discharge gas temperature must not exceed 135°C for VCH115.
The
for VCH115 guarantees reliable operations of the compressor for steady-state
operation.
High pressure switch
The high-pressure switch must be set at or below “Maximum high pressure switch setting”. The high-
pressure switch must never be bypassed or delayed and must be placed in a lockout circuit to prevent cycling.
If a discharge valve is used, the HP switch must be connected to the service valve gauge port, which cannot be
isolated.
For CDC100 drive, HP switch can be connected to STO (Safe Torque
Off)
or to an external contactor placed between
drive and compressor.
C
ondensing t
emper
atur
e (°C
)
Evaporating temperature (°C)
5
10
15
20
25
30
35
40
45
50
55
60
65
70
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
30-140rps
40-140rps
40-120rps
40-120rps
Wet injection area
C
ondensing t
emper
atur
e (°F)
41
50
59
68
77
86
95
104
113
122
131
140
149
158
Danfoss
OE-000003
Evaporating temperature (°F)
-40
-31
-22
-13
-4
5
14
23
32
41
50
59
68
77
86
HPS
High pressure safty switch (44 barg)
Low pressure switch
The low-pressure switch must be set at or above “Minimum Low pressure switch setting”. Operating at low
pressures may cause damage to the compressor due to low mass
flow
through it. The LP switch must be an
immediate, no delay feature.
The switch can be integrated directly in the safety chain of the compressor or it can be treated by the unit controller.
For a manual or automatic reset, there is a maximum of 5 auto resets during a period of 12 hours. After this
threshold is crossed, a manual reset will be required.
Scroll compressors, VCH115 | Application
© Danfoss | Climate Solutions | 2023.08
AB392939083370en-000202 | 32
