RedZone DVS1000 - Page 13

REDZONE
TM
DVS SERIES AIR HANDLER MANUAL
13
INSTALLATION
PROCEDURE FOR CALCULATING
THE TOTAL EQUIVALENT
LENGTH OF PIPE
Given piping assembly as shown in Figure 10 below,
what is the total equivalent length of the system?
First,determinethetotalstraightpipelengths;next
refer to Table 2 to determine the equivalent straight pipe
length for each fitting shown. Add together the
equivalent lengths of piping and fittings.
Where possible the length of pipe should not
exceed60feetequivalentlength1/2”pipeor
120 feet equivalent length 3/4” pipe.
Any piping running through unconditioned
space MUST be insulated to prevent heat loss,
and possible freezing of the line.
Stickers indicating direction of flow, (WATER IN,
and WATER OUT) are labeled on the outside of the
cabinet. DO NOT reverse these lines, as this will
cause the unit to malfunction.
NOTICE
ball valves
cap
3/4 in. type M copper tubing
13 ft 15 ft
5 ft
10 ft
3 ft
3 ft
3 ft3 ft3 ft3 ft
12 ft
10 ft
Air separator
(optional)
Fitting or Valve 1/2” 3/4”
90 deg. elbow 1 2
45 deg. elbow 0.5 0.75
Straight thru tee 0.3 0.4
Side port tee 2 3
Reducer coupling 0.4 0.5
Gate valve 0.2 0.25
Globe valve 15 20
Angle valve 3.1 4.7
Ball valve 1.9 2.2
Swing check valve 2 3
Butterfly valve 1.1 2
Air separator (optional) NA 0.3
Table 2: Equivalent Length of Straight Pipe
for Valves and Fittings (ft)
3/4” Tubing (total straight pipe length) 68 ft.
(6) 3/4” 90 deg. Elbows 6(2) = 12 ft.
(2) 3/4” Side port tee 2(3) = 6.0 ft.
(1) 3/4” Air separator (optional) 1(0.3) = 0.3 ft.
(2) 3/4” Ball valves 2(2.2) = 4.4 ft.
Total Equivalent Length 90.7 ft.
FIGURE 10
Equivalent Length Calculation