Install Instructions
RP913A LOAD ANALYZER RELAY
CONNECT
1/4 IN.
(6 MM)
PLASTIC
CONNECT
1/4 IN.
O.D. PLASTIC
COPPER
TUBING CUT TO
LENGTH
RP913A
1/4 IN. (4 MM) O.D.
PLASTIC/COPPER
ADAPTER
(CCTI633BT)
1/4 IN. (6 MM)
(6 MM)
1/4 IN. (6 MM) O.D.
COPPER TUBING
C8138
Fig. 4. Adaptation Piping.
Port Identification
There are 10 ports. Ports 1 through 7 are the input ports
from zone thermostats (Fig. 5). The Main (M ) port is
connected to the system air supply. The H and L ports (H,
higher pressure; L lower pressure) provide the output
control signals.
Fig. 5 Port Identification.
Port Identification Table
Checkout and Test
Ensure that the output of the L port matches the lowest
input pressure from the zone thermostat, and the output of
the H port matches the highest input pressure signal.
Plug the unused H or L port, and connect the
unused input ports to used input ports.
Adjust all inputs so they are equal, then lower one
input. The output of the L port should track the
lowered input signal.
Adjust all inputs so they are equal, then increase
one input. The output of the H port should track the
increased input.
If the RP913A still does not operate properly and the
main air supply and inputs are correct, check for
possible leaks in the input lines. If the malfunction is
not located, replace the RP913A and recheck per
the above instructions.
ENGINEERING DATA
Specifications
Model:
RP913A Optimatic Load Analyzer
Operating Pressure (Switch and Pilot) Range:
Normal:18 psi (124 kPa
Maximum pressure to any port must not exceed 25 psi
(172 kPa.)
Ambient Operating Limits:
Temperature: 40 to 140°F (4 to 60°C)
Relative Humidity: 10 to 90%
Air Consumption
0.04 scfm (0.019 ml/s)
Construction
Manifold and cover plate are glass-filled, molded
thermoplastic
Restrictions are stainless steel
Diaphragms are cork neoprene
Operation
The RP913A selects the lowest or highest pressure, which
is then available at the L or H port.
Each RP913A contains 14 small diaphragms and control
nozzles (Fig. 6.) The diaphragms are arranged in two rows
of seven diaphragms. One row selects the highest pressure,
the other row selects the lowest pressure. Each input
pressure is connected to two diaphragms, one in each row.
95-7114
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