Bryant 450D - Manual (Page 3)

AVOID
OPEN
WINDOWS
AVOID OVERHANG
SLEEPING
QTRS.
□
AVOID
“ELLS"
7 PREVWUNG
WIND
GARAGE
LIVING
AREA
Figure 2
TABLE I . DISTANCE BETWEEN COIL AND CHILLER
NOMINAL PIPE SIZE POLYETHYLENE
Feet
COPPER
Feet
GALVANIZED
Feet
36 54 36 54 36 . 54
3/4 40 — 35 — 25 —
1 150 ^ 45 140 ^ 40 90 ^ 30
1-1/4 530 ^ 145 * 360 ^ 100^ 370 ^ 90 ^
M/2 1585 ^ 310 * 815 a ^ 205^ 770 ^ 190 ^
NOTES Values shown are for one direction only. Multiply by two to obtain the total length
of pipe from chiller to coil and return.
* Pipe lengths exceeding 75 feet may require additional chilled water additive. (See Section V,
this instruction.
GOOD
LOCATION
II. CONNECT CHILLED WATER LINES
A. MATERIALS
Refer to section on “Cold Weather Protection” at the
end of this instruction.
1. Piping
a. Polyethylene Plastic Pipe - use medium density
flexible pipe whose wall thickness approximates
Schedule 40 pipe (Commercial Standard CS 197-
60). Pipe must be virgin plastic. Do not use
pipe manufactured from re-claimed plastic.
b. Copper - satisfactory substitute.
c. Galvanized - satisfactory substitute.
2. Fittings
a. Nylon - use when possible.
b. Brass - satisfactory substitute.
c. Galvanized - satisfactory substitute.
B. PIPE LENGTH AND DIAMETER
Table I shows maximum length of pipe of different
diameters that can be used between the pump dis­
charge and the coil inlet and still maintain minimum
allowable (design) water flow rate.
1. Multiply table values by two to obtain the total
length of pipe from chiller to coil and return.
2. Length is measured along the pipe path and
therefore includes vertical distance between the
water coil and the chiller.
3. Lengths shown in Table I are based on using a
total of eight elbows in the entire water line
(chiller to coil and return). Lengths are predi­
cated on the use of a Bryant matching water coil.
For greater distances use larger pipe or add a
pump.
EH 450
- 3 -