User Guide

12
Design Guide - HZH/HZV Series
Operation in Shaded Area: Closed Loop
Application
For operation in the shaded area, appropriate levels of a
proper antifreeze should be used in systems with leaving
water temperatures of 40°F or below and the JW3 jumper
should be clipped. This is due to the potential of the
refrigerant temperature being as low as 32°F [0°C] with 40°F
[4.4°C] LWT, which may lead to a nuisance cutout due to the
activation of the Low Temperature Protection. JW3 should
never be clipped for systems without antifreeze.
Open Loop Application:
For operation in shaded area (below 40°F LWT) in open loop
applications, ∆T (on DXM2) should be set such that the LWT
(=EWT - ∆T) doesn’t drop below 40°F. JW3 should NEVER be
clipped for systems without antifreeze.
Antifreeze use recommended in this range. Also Clip JW3 on DXM2 board.
Heating - EAT 70°F
GPM
WPD
CFM
HC kW
COP
HE
LAT LWT HWC
PSI
FT
4.5 2.5 5.8 725 11.3 1.1 2.9 7.4 84 16.7 1.2
4.5 2.5 5.8 850 11.5 1.1 3.1 7.7 82 16.6 1.2
2.3 0.7 1.7 725 12.5 1.1 3.2 8.6 86 22.4 1.4
2.3 0.7 1.7 850 12.7 1.1 3.4 8.9 84 22.1 1.3
3.4 1.3 3.0 725 13.1 1.1 3.3 9.1 87 24.6 1.4
3.4 1.3 3.0 850 13.2 1.1 3.5 9.5 84 24.4 1.4
4.5 2.0 4.6 725 13.4 1.1 3.4 9.4 87 25.8 1.4
4.5 2.0 4.6 850 13.5 1.1 3.6 9.8 85 25.7 1.4
2.3 0.5 1.2 725 14.5 1.2 3.7 10.6 89 30.6 1.6
2.3 0.5 1.2 850 14.7 1.1 3.9 10.9 86 30.3 1.5
3.4 1.0 2.4 725 15.2 1.2 3.9 11.3 89 33.4 1.6
3.4 1.0 2.4 850 15.4 1.1 4.1 11.7 87 33.1 1.6
4.5 1.6 3.8 725 15.6 1.2 4.0 11.7 90 34.8 1.7
4.5 1.6 3.8 850 15.8 1.1 4.2 12.1 87 34.6 1.6
2.3 0.4 1.0 725 16.6 1.2 4.2 12.6 91 38.8 1.8
2.3 0.4 1.0 850 16.8 1.1 4.4 13.0 88 38.4 1.7
3.4 0.9 2.0 725 17.5 1.2 4.4 13.5 92 42.0 1.8
3.4 0.9 2.0 850 17.8 1.1 4.7 14.0 89 41.8 1.8
4.5 1.4 3.2 725 18.0 1.2 4.5 14.0 93 43.8 1.9
4.5 1.4 3.2 850 18.2 1.1 4.8 14.4 90 43.6 1.8
2.3 0.4 1.0 725 18.8 1.2 4.7 14.8 94 46.9 1.8
2.3 0.4 1.0 850 19.0 1.1 5.0 15.2 91 46.5 1.9
3.4 0.8 1.8 725 19.8 1.2 5.0 15.8 95 50.7 1.9
3.4 0.8 1.8 850 20.1 1.1 5.3 16.3 92 50.4 2.0
4.5 1.3 2.9 725 20.4 1.2 5.1 16.4 96 52.7 1.9
4.5 1.3 2.9 850 20.7 1.1 5.4 16.8 93 52.5 2.0
2.3 0.4 1.0 725 20.9 1.2 5.2 16.9 97 55.0 2.0
2.3 0.4 1.0 850 21.2 1.1 5.5 17.4 93 54.6 2.0
3.4 0.8 1.8 725 22.1 1.2 5.5 18.1 98 59.4 2.1
3.4 0.8 1.8 850 22.4 1.1 5.8 18.5 94 59.1 2.1
4.5 1.2 2.7 725 22.7 1.2 5.6 18.6 99 61.7 2.1
4.5 1.2 2.7 850 23.0 1.1 6.0 19.1 95 61.5 2.2
For operation in the shaded area when water is used in lieu of
an antifreeze solution, the LWT (Leaving Water Temperature)
must be calculated. Flow must be maintained to a level such
that the LWT is maintained above 40°F [4.4°C] when the
JW3 jumper is not clipped (see example below). Otherwise,
appropriate levels of a proper antifreeze solution should
be used in systems with leaving water temperatures of 40ºF
[4.4°C] or below and the JW3 jumper should be clipped. This
is due to the potential of the refrigerant temperature being as
low as 32°F [0°C] with 40°F [4.4°C] LWT, which may lead to a
nuisance cutout due to the activation of the Low Temperature
Protection. JW3 should never be clipped for standard range
equipment or systems without antifreeze.
Example:
At 50°F EWT (Entering Water Temperature) and 1.5 gpm/
ton, a 3 ton unit has a HE of 22,500 Btuh. To calculate LWT,
rearrange the formula for HE as follows:
HE = TD x GPM x 500, where HE = Heat of Extraction (Btuh);
TD = temperature difference (EWT - LWT) and GPM = U.S.
Gallons per Minute.
TD = HE / (GPM x 500)
TD = 22,500 / (4.5 x 500)
TD = 10°F
LWT = EWT - TD
LWT = 50 - 10 = 40°F
In this example, as long as the EWT does not fall below 50°F, the system will operate as designed. For EWTs below 50°F, higher
ow rates will be required (open loop systems, for example, require at least 2 gpm/ton when EWT is below 50°F).
20 7.0 4.5 10.3 0 0 0 0 0 0 0 710 11.6 1.05 8.2 85.1 3.25
20 7.0 4.5 10.3 0 0 0 0 0 0 0 825 11.7 1.02 8.4 83.2 3.38
30 3.5 1.2 2.8 620 22.2 14.0 0.63 0.58 24.1 38.3 710 13.6 1.09 10.1 87.8 3.66
30 3.5 1.2 2.8 725 22.5 14.7 0.65 0.59 24.4 38.3 825 13.8 1.06 10.3 85.5 3.81
30 5.8 2.9 6.6 620 22.4 14.0 0.63 0.57 24.3 39.2 710 14.2 1.09 10.7 88.5 3.81
30 5.8 2.9 6.6 725 22.7 14.7 0.65 0.58 24.7 39.2 825 14.4 1.06 10.9 86.1 3.97
30 7.0 4.1 9.4 620 22.5 14.0 0.62 0.56 24.4 39.8 710 14.4 1.09 10.9 88.8 3.86
30 7.0 4.1 9.4 725 22.8 14.7 0.65 0.57 24.7 39.8 825 14.6 1.06 11.1 86.3 4.02
40 3.5 1.1 2.5 620 22.9 15.1 0.66 0.65 25.1 35.3 710 16.1 1.15 12.3 90.9 4.08
40 3.5 1.1 2.5 725 23.3 15.8 0.68 0.66 25.5 35.3 825 16.2 1.12 12.6 88.2 4.25
40 5.8 2.6 5.9 620 23.1 15.1 0.65 0.61 25.2 37.9 710 16.7 1.15 13.0 91.8 4.25
40 5.8 2.6 5.9 725 23.4 15.9 0.68 0.62 25.5 37.9 825 16.9 1.12 13.3 89.0 4.42
40 7.0 3.6 8.4 620 23.2 15.1 0.65 0.6 25.2 38.3 710 16.9 1.16 13.2 92.1 4.30
40 7.0 3.6 8.4 725 23.5 15.9 0.68 0.61 25.6 38.3 825 17.1 1.12 13.5 89.2 4.47
50 3.5 1.0 2.3 620 22.7 15.4 0.68 0.74 25.2 30.7 710 18.3 1.18 14.5 93.9 4.56
50 3.5 1.0 2.3 725 23.0 16.2 0.70 0.75 25.6 30.7 825 18.5 1.14 14.8 90.8 4.75
50 5.8 2.4 5.6 620 22.9 15.5 0.67 0.69 25.3 33.4 710 19.1 1.18 15.2 94.8 4.73
50 5.8 2.4 5.6 725 23.3 16.3 0.70 0.70 25.6 33.4 825 19.3 1.15 15.5 91.6 4.93
50 7.0 3.4 7.9 620 23.0 15.5 0.67 0.67 25.3 34.1 710 19.3 1.18 15.4 95.1 4.78
50 7.0 3.4 7.9 725 23.3 16.3 0.70 0.68 25.6 34.1 825 19.5 1.15 15.7 91.9 4.98
60 3.5 1.0 2.2 620 21.9 15.3 0.70 0.85 24.8 25.9 710 20.4 1.21 16.5 96.6 4.93
60 3.5 1.0 2.2 725 22.2 16.1 0.73 0.86 25.1 25.9 825 20.6 1.18 16.8 93.2 5.13
60 5.8 2.3 5.2 620 22.4 15.5 0.69 0.78 25.1 28.6 710 21.2 1.22 17.3 97.7 5.10
60 5.8 2.3 5.2 725 22.7 16.3 0.72 0.80 25.4 28.6 825 21.5 1.18 17.6 94.1 5.31
60 7.0 3.2 7.4 620 22.5 15.5 0.69 0.77 25.1 29.4 710 21.5 1.22 17.5 98.0 5.15
60 7.0 3.2 7.4 725 22.9 16.3 0.71 0.78 25.5 29.4 825 21.7 1.19 17.8 94.3 5.36
70 3.5 0.9 2.1 620 20.7 14.8 0.72 0.97 24.0 21.4 710 22.4 1.23 18.4 99.2 5.35
70 3.5 0.9 2.1 725 21.0 15.6 0.74 0.98 24.3 21.4 825 22.7 1.19 18.8 95.4 5.57
70 5.8 2.1 4.9 620 21.4 15.1 0.71 0.90 24.4 23.8 710 23.3 1.24 19.3 100.4 5.52
70 5.8 2.1 4.9 725 21.7 15.9 0.73 0.91 24.8 23.8 825 23.5 1.20 19.6 96.4 5.75
70 7.0 3.0 7.0 620 21.6 15.2 0.71 0.88 24.6 24.5 710 23.5 1.24 19.5 100.7 5.57
70 7.0 3.0 7.0 725 21.9 16.0 0.73 0.89 24.9 24.5 825 23.8 1.20 19.9 96.7 5.80
80 3.5 0.8 1.9 620 19.3 14.2 0.73 1.10 23.1 17.5 710 24.4 1.25 20.3 101.8 5.73
80 3.5 0.8 1.9 725 19.6 14.9 0.76 1.12 23.4 17.5 825 24.6 1.21 20.7 97.7 5.97
80 5.8 2.0 4.6 620 20.1 14.5 0.72 1.03 23.6 19.5 710 25.3 1.26 21.2 103.0 5.90
80 5.8 2.0 4.6 725 20.4 15.3 0.75 1.04 23.9 19.5 825 25.6 1.22 21.6 98.7 6.15
80 7.0 2.8 6.5 620 20.3 14.6 0.72 1.01 23.7 20.1 710 25.6 1.26 21.5 103.4 5.95
80 7.0 2.8 6.5 725 20.6 15.4 0.75 1.02 24.0 20.1 825 25.9 1.22 21.9 99.0 6.20
85 3.5 0.8 1.9 620 18.7 13.9 0.75 1.18 22.7 15.9 710 25.3 1.26 21.2 103.0 5.91
85 3.5 0.8 1.9 725 18.9 14.6 0.77 1.19 23.0 15.9 825 25.6 1.22 21.7 98.7 6.15
85 5.8 1.9 4.5 620 19.3 14.2 0.73 1.10 23.1 17.5 710 26.3 1.27 22.2 104.3 6.08
85 5.8 1.9 4.5 725 19.6 14.9 0.76 1.12 23.4 17.5 825 26.6 1.23 22.6 99.9 6.33
85 7.0 2.7 6.3 620 19.5 14.3 0.73 1.08 23.2 18.0 710 26.6 1.27 22.5 104.7 6.13
85 7.0 2.7 6.3 725 19.8 15.0 0.76 1.10 23.6 18.0 825 26.9 1.24 22.9 100.2 6.38
90 3.5 0.8 1.8 620 18.0 13.7 0.76 1.25 22.3 14.4 710 26.3 1.27 22.2 104.3 6.08
EWT
°F
GPM
WPD Cooling - EAT 80/67°F Heating - EAT 70°F
PSI FT
Airow
CFM
TC SC
Sens/Tot
Ratio
kW HR EER
Airow
CFM
HC kW HE LAT COP
20 Operation not recommended
30
40
50
60
70
80
85
90
100
Operation not recommended
110
120
Performance Data Selection Notes - vFlow
®
Models
Performance Data Selection Notes - Models without vFlow
®