Quantech QTC3040T, Installation Operation & Maintenance

Page: 136 / 190

QUANTECH
136
FORM QTC3-NM1
ISSUE DATE 08/03/2022
SECTION 7 – UNIT CONTROLS
TABLE 15 - PROGRAM KEY LIMITS AND DEFAULT (CONT’D)
PROGRAM VALUE LOW LIMIT HIGH LIMIT OPTIONS DEFAULT
Control Mode — —
(European Feature Set, R-
410A/R-454B)
LEAVING or RETURN
LEAVING
Hot Gas Bypass Valve Type — —
(R-410A/R-454B Chiller or
Condensing Unit)
NONE, SYS 1,
BOTH SYSTEMS, or SYS 2
SYS 1
Unit Type Select — —
(R-410A/R-454B Chiller or
Condensing Unit)
STANDARD or YCWL HP
STANDARD
Operating Envelope — —
(031-02755-004,
R-410A/R-454B)
DISABLE, STANDARD, or
EXTENDED
DISABLE
Sys 1,2 Comp. Sequence — —
(031-02755-004)
AUTO, COMP 1
COMP 2, or COMP 3
AUTO
Sys 1,2/Compressor 1-3 Operating Hours
(1 Inc./Dec. per entry position)
0 99999 — 0
Sys 1,2/Compressor 1-3 Start Counters
(1 Inc./Dec. per entry position)
0 99999 — 0
EEV Max Operating Pressure
(031-02577-004, EEV)
(5.0 Inc./Dec.)
20.0 psig
(1.38 barg)
600.0 psig
(41.38 barg)
—
150.0 psig
(10.34 barg)
Chilled Liquid Cooling Type* — —
(Chillers and Heat Pump
Cooling Only)
WATER or GLYCOL
WATER
* If the chilled liquid cooling type is modified, the suction pressure cutout is set to the default value.
Selecting Low Temperature
To enable the LOW TEMPERATURE operation, com-
plete the following steps:
1. Under SERVICE MODE, select GLYCOL.
2. To display the following screen, press PRO-
GRAM, ↓, ↑, ↑, ↓, ENTER in sequence.
S T A N D A R D T E M P E R A T U R E
G L Y C
O L
or
L O W T E M P E R A T U R E
G L Y C
O L
3. To select the required option, use the ↑ and ↓ keys.
See
Table 13
and
Table 14
for the modified limits
when the low temperature glycol is enabled.