LAARS Pennant PNCV (Sizes 500-2000) - Install and Operating Manual - Manual (Page 21)

Pennant (500-2000) Page 21
Figure 9. Water Heater Piping — One Heater, One Tank.
NOTES:
6. CAUTION: PUMP SIZING MUST BE BASED UPON WATER HARDNESS AT
JOB SITE
1. OPTIONAL CWMU & RECIRC. LINE LOCATION.
2. LOCATE PENNANT DHW SENSOR OR REMOTE AQUASTAT
WELL IN LOWER 1/3 OF TANK.
3. BACK FLOW PREVENTER MAY BE REQUIRED. CHECK LOCAL CODES.
4. THERMAL EXPANSION TANK MAY BE REQUIRED. CHECK LOCAL CODES.
5. WHEN USING FACTORY MOUNTED PUMP, MAX PIPE LENGTH IS
30 FEET TOTAL, SIX 90° ELBOWS , FULL PIPE SIZE.
SU
PPL
Y
REC
IR
C.
CW
MU
1
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
LEGEND
CHECK VALVE
THERMOMETER
TEMPERATURE
SENSOR
GLOBE VALVE
EXPANSION TANK
3-WAY VALVE
VALVE
PRESSURE REDUCING
VALVE
PUMP
PRV
TPRV
WATER CATEGORY
GRAIN HARDNESS PER GALLON
PPM / 17.1 = Grains Per Gallon
KEY:
S = SOFT
N = NORMAL
H = HARD 1 THROUGH 7.5
7.6 THROUGH 17
OVER 17
LOCATION OF
FACTORY-MOUNTED
PUMP
2
5
3
4
4B.5 Freeze Protection – Water Heater
Although Pennant water heaters are design-
certified for outdoor installations, such installations
are not recommended in areas subject to freezing
temperatures, unless proper precautions are taken.
Power outage, interruption of gas supply, failure
of system components, activation of safety devices,
etc., may prevent a heater from firing. Any time a
heater is subjected to freezing conditions, and the
heater is not able to fire, and/or the water is not
able to circulate, there is a risk of freezing in the
heater or in the pipes in the system. When water
freezes, it expands. This can result in bursting of pipes
in the system, or damage to the heater, which could
result in leaking or flooding conditions.
Contact the local factory representative or Laars
for additional information.