Plumbing - Rinnai 37AHA Series Training Manual

Plumbing

Recommended Piping Arrangements –
When installing water lines, compliance to local sanitary codes must be adhered to.
The Hydronic Air Handler contains two 3/4 in, Dia. X 2-1/2 in. long copper studs to connect
the "Water In" and the "Water Out". Mating connectors using field supplied 3/4 in. FNPT-
sweat ends or two field-supplied 3/4 in. SharkBite™ type FNPT-push fittings ends
All associated hydronic piping MUST comply with ICC, UPC and any other local codes or
ordinances having jurisdiction. USE POTABLE GRADE PIPING AND ACCESSORIES ONLY
Soldering Copper Tubing –
Use only 95/5/tin antimony solder for all piping systems that incorporates a domestic water
supply
Flow Sensor –
Installation of the flow sensor requires two (2) ¾" female NPT field supplied fittings. Apply
Teflon Tape or other pipe sealant to ensure a leak proof connection.
Note: Care must be taken to ensure the flow sensor is not damaged due to excessive
tightening. Do not exceed a maximum torque of 15 ft/lbs when tightening the fittings.
NOTICE: Where possible the length of pipe should not exceed 150 feet equivalent length.
Rinnai Flow Sensor
FS
4 ft
12 ft
ball valves
3 ft 3 ft
Fitting or Valve
90 deg. Elbow
Side port tee
Taco 49-075 Air
Rinnai Flow Sensor
Ball valve
18
3/4 in. type M copper tubing
9 ft
10 ft
5 ft
10 ft
3 ft 3 ft
TACO Model 49-075
Air Separator
3/4"
2
3
0.3
3.2
2.2
Rinnai Corporation Hydronic Air Handler 101 Training Manual
gauge
15 ft
3 ft
¾" Tubing (total straight pipe length)....68 ft.
(6) ¾" 90 deg. Elbows............6(2) = 12 ft.
(2) ¾" Side port tee...............2(3) = 6.0 ft.
(1) ¾" Taco air separator....1(0.3) = 0.3 ft.
(1) ¾" Rinnai flow sensor.....1(3.2) = 3.2 ft.
(2) ¾" Ball valves................2(2.2) = 4.4 ft.
Total Equivalent length..................93.9 ft.
3 ft
cap
Any piping running through unconditioned
space MUST be insulated to prevent heat
loss, and possible freezing of the lines.
Refer to the Installation Manual for more
information on pipe equivalency