Quantech QWC4, Installation Operation & Maintenance, Page: 76 / 156

QUANTECH
76
FORM QWC4-NM1 (221)
ISSUE DATE: 02/28/2021
SECTION 4 - TECHNICAL DATA
TABLE 26 - WATER FLOW RATE LIMITS GPM (L/S) (BASED UPON STANDARD TUBES AT DESIGN
FULL LOAD CONDITIONS)
PIN 5, 6
EVAPORATOR
PIN 7, 8
CONDENSER
2 PASS 3 PASS 1 PASS 2 PASS 3 PASS
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
BB
240
(15)
750
(47)
160
(10)
490
(31)
BB
390
(25)
1560
(98)
190
(12)
780
(49)
130
(8)
520
(33)
BC
280
(18)
870
(55)
190
(12)
570
(36)
BC
440
(28)
1780
(112)
220
(14)
890
(56)
150
(9)
590
(37)
BD
330
(21)
910
(57)
220
(14)
660
(42)
BD
480
(30)
1950
(123)
240
(15)
910
(57)
— —
CB
240
(15)
750
(47)
160
(10)
490
(31)
CB
390
(25)
1560
(98)
190
(12)
780
(49)
130
(8)
520
(33)
CC
280
(18)
870
(55)
190
(12)
570
(36)
CC
440
(28)
1780
(112)
220
(14)
890
(56)
150
(9)
590
(37)
CD
330
(21)
910
(57)
220
(14)
660
(42)
CD
480
(30)
1950
(123)
240
(15)
910
(57)
— —
DB
240
(15)
750
(47)
160
(10)
490
(31)
DB
390
(25)
1560
(98)
190
(12)
780
(49)
130
(8)
520
(33)
DC
280
(18)
870
(55)
190
(12)
570
(36)
DC
440
(28)
1780
(112)
220
(14)
890
(56)
150
(9)
590
(37)
DD
330
(21)
910
(57)
220
(14)
660
(42)
DD
480
(30)
1950
(123)
240
(15)
910
(57)
— —
The expected waterside pressure drop at design flow is provided on the particular chiller sales order form header.
When rated in accordance with AHRI-550 standard, the actual pressure drop for clean tubes is permitted to be
lower than of 15% greater than the stated value.
To determine flow or waterside pressure drop at conditions other than sales order design, use the following rela-
tionship and solve for the unknown parameter. Be sure to use consistent units of measure:
Design Flow
Design Pressure Drop
Actual Flow
Actual Pressure Drop
=