Pressure Drop; Operating Limits - York YAWS018 - 075 Installation Manual

Pressure Drop

Model GPM
30°F
3.0 0.5
4.0 1.1
018R*
5.0 1.6
6.0 2.1
4.0 0.7
5.5 1.3
025R*
7.0 1.9
8.5 2.6
5.0 0.9
7.5 2.3
040H/R
10.0 3.7
12.5 5.0
8.0 1.7
11.5 3.6
050H/R
15.0 5.6
18.5 8.3
9.0 1.4
13.5 4.2
060H/R
18.0 6.9
22.5 10.7
10.0 3.2
14.5 5.5
075H/R
19.0 7.9
23.5 11.5
NOTES: Temperatures are Entering Water Temperatures
*Domestic water heating units source side
pressure drop and reversible units load and
source pressure drop.

Operating Limits

Operating Limits
Source Side Water Limits
Minimum Entering Water
Normal Entering Water
Maximum Entering Water
Load Side Water Limits
Minimum Entering Water
Normal Entering Water
Maximum Entering Water
NOTES: Minimum/maximum limits are only for start-up
conditions, and are meant for bringing the space up to
occupancy temperature. Units are not designed to operate
at the minimum/maximum conditions on a regular basis.
The operating limits are dependant upon three primary
factors: 1) entering source temperature, 2) entering load
temperature, and 3) flow rate (gpm). When any of the
factors are at the minimum or maximum levels, the other
two factors must be at the normal level for proper and
reliable unit operation. Consult the Capacity Tables for each
model to determine allowable normal operating conditions.
Units are not designed for outdoor installation.
Pressure Drop (psi)
60°F 80°F 100°F
0.4 0.4 0.3
0.9 0.9 0.8
1.4 1.4 1.3
1.9 1.9 1.8
0.6 0.4 0.3
1.1 0.9 0.7
1.7 1.5 1.3
2.4 2.2 2.0
0.6 0.6 0.5
2.1 2.0 1.9
3.5 3.3 3.2
4.7 4.4 4.2
1.4 1.4 1.3
3.4 3.2 3.0
5.4 5.0 4.6
8.1 7.6 7.2
1.1 1.0 1.0
3.9 3.5 3.1
6.7 6.0 5.2
10.5 10.0 9.4
3.0 2.8 2.7
5.3 5.1 4.9
7.6 7.3 7.1
11.3 11.0 10.8
Cooling Heating
°F °C °F
30 -1.1 20
85 29.4 60
110 43.3 90
50 10.0 60
60 15.6 100
90 32.2 120
AFFINITY SINGLE STAGE HYDRONIC INSTALLATION MANUAL
Vented Only Load Side
120°F
0.3 Model GPM
0.8
3.0
1.3
4.0
1.8 018H
5.0
0.3
6.0
0.6
4.0
1.2
5.5
1.9 025H
7.0
0.5
8.5
1.8
NOTES: Temperatures are Entering Water Temperatures.
3.0
Double wall vented coax for heating potable water
4.0
1.3
2.8
4.2
6.8
0.9
2.7
4.5
8.7
2.5
4.7
6.8
10.5
8/9/10
°C
-6.7
15.6
32.2
15.6
37.8
48.9
35
Pressure Drop (psi)
60°F 80°F 100°F
0.5 0.4 0.4
1.4 1.3 1.2
2.2 2.1 2.1
3.0 2.9 2.9
1.3 1.3 1.2
3.0 2.9 2.8
4.6 4.4 4.3
6.7 6.5 6.4
120°F
0.3
1.2
2.0
2.8
1.2
2.7
4.1
6.2
7/13/09