Lochinvar PF 502 - 2001 User Manual

MOTORIZED 3-WAY VALVE APPLICATION INSTRUCTIONS FOR

LOW TEMPERATURE PROTECTION

KIT VAL30002

MODELS PB 502 - 2001

INS70023 Rev B

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CAUTION

Pump and motor unit are designed to be
supported by the inline piping only. Do not
support in any other manner. When placing
pump between flanges, tighten flange bolts
evenly and do not tighten excessively.

Figure 1 2-1/2" Motorized 3-Way Valve

A

AB

B

SYSTEM

WATER

BOILER
WATER

MIXED

WATER

WATER FLOW

WATER FLOW

WATER FLOW

Figure 2 2-1/2" Motorized 3-Way Valve Diagrams

Model

Part

Number

Component Description

PF 502 - 2001

VAL20009 2-1/2" Motorized 3-Way Valve

WRE7021 18 GA White Wire (5 ft.)

WRE7024 18 GA Blue Wire (5 ft.)

WRE7025 18 GA Pink Wire (5 ft.)

WRE7031 18 GA Yellow Wire (5 ft.)

INS70023 Instruction Sheet

Valve technical data

Power Supply: 22-26 VAC or 28-32 VDC
Max. Power Consumption: 6VA @ 26VAC at Full Load
Control Signals: 3 Wire 3 Point Floating
To r q u e : 50 in.lb. or 5.6 Nm at Rated Voltage
Rotation Time: 0-50 in.lb. / 20-30 Seconds Through 90˚
Actuator Ambient Temperature: 0˚F to +122˚F or -18˚C to +50˚C

Enclosure: Motor -UL recognized QMFZ Fire Rated 94 - 5 Gear

Train - Die Cast Zinc with a Steel Base

Valve B o dy : Forged Brass ASTM B283
Ball and Stem: Nickel Plated Brass
End Connections: 2-1/2" NPT Female
Max. Close-Off Pressure: 40 PSIG

List of kit components

NOTE: A-B-AB is noted on the valve to depict proper

orientation. Arrows depict flow direction.

CAUTION

Valve is intended for indoor use only.

(3.937)

HANDLE IN
MOUNTED
POSITION

11.500

7.850

5.540

7.956

6.650

4.350

IMPORTANT NOTE:

DISCONNECT POWER TO ACTUATOR BEFORE
DEPRESSING CLUTCH RELEASE. FAILURE TO DO
SO MAY DAMAGE THE DRIVE MECHANISM.

3.228

HANDLE IN
STORAGE
POSITION

2-1/2" NPT
FEMALE
THREAD

(3.535)

2 of 4

Wiring instructions

1. Locate the 18 GA white (WRE7021), blue (WRE7024),
pink (WRE7025), and yellow (WRE7031) wires provided
in the kit. As indicated by Steps 2 through 5 below, route
each wire from the connection board inside the motorized
3-way valve (VAL20009) to the connection board inside
the junction box on the back of the unit (FIG. 3).

NOTE

: Lift the cover on the motorized 3-way valve to

gain access to the connection board.

2. Route the yellow wire from the #1 terminal on the valve
(COM) to the #7 terminal on the PF connection board.

3. Route the blue wire from the #2 terminal on the valve (24V)
to the #8 terminal on the PF connection board.

4. Route the white wire from the #3 terminal on the valve
(DRIVE CW) to the #5 (OPEN) terminal on the PF
connection board.

5. Route the pink wire from the #4 terminal on the valve
(DRIVE CCW) to the #6 (CLOSE) terminal on the PF
connection board.

Pump sizing instructions

INS70023 Rev B

A

2
3
4
5
6
7

8
9
10

D

ETAIL

A

Figure 3 Route wires to connection boards

See Table 1 for the VAL20009 pressure drop information at
varying flows. Reference Table 2 below for heat exchanger
pressure drop information at varying flows.

The boiler pump must be sized based on the boiler, flow, and head
loss of your specific application.

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WARNING

Pump must be properly sized to overcome
the head loss of: (1) the boiler heat
exchanger as detailed in Table 2; (2) the
VAL20009 valve as detailed in Table 1 and the
equivalent feet of piping specific to each
application.

Table 1 – VAL20009 Pressure Drop

2-1/2" 3-Way Valve

Head Loss Flow

3.9 Ft/hd 95 GPM

3.7 Ft/hd 90 GPM

2.8 Ft/hd 85 GPM

2.8 Ft/hd 80 GPM

2.5 Ft/hd 75 GPM

2.1 Ft/hd 70 GPM

1.6 Ft/hd 65 GPM

1.4 Ft/hd 60 GPM

1.2 Ft/hd 55 GPM

1.2 Ft/hd 50 GPM

0.7 Ft/hd 45 GPM

0.7 Ft/hd 40 GPM

0.5 Ft/hd 35 GPM

0.5 Ft/hd 30 GPM

0.2 Ft/hd 25 GPM

0.2 Ft/hd 20 GPM

Table 2 – Heat Exchanger Pressure Drop

SYSTEM TEMPERATURE RISE CHART

BTU/HR 30°F ΔT 35°F ΔT 40°F ΔT 45°F ΔT 50°F ΔT 55°F ΔT 60°F ΔT

Input Output GPM Ft/hd GPM Ft/hd GPM Ft/hd GPM Ft/hd GPM Ft/hd GPM Ft/hd GPM Ft/hd
500,000 435,000 29.0 0.9 24.9 0.7 21.8 0.5 19.3 0.4 17.4 0.3 15.8 0.2 14.5 0.1
750,000 652,500 43.5 2.1 37.3 1.8 32.6 1.3 29.0 1.0 26.1 0.8 23.7 0.7 21.8 0.6

1,000,000 870,000 58.0 4.8 49.7 3.3 43.5 2.4 38.7 2.0 34.8 1.6 31.6 1.2 29.0 1.1
1,300,000 1,131,000 75.4 9.8 64.7 6.9 56.6 4.6 50.3 3.6 45.3 2.9 41.1 2.2 37.7 1.9
1,500,000 1,275,000 87.9 9.8 75.3 7.7 65.9 6.3 58.6 5.2 52.9 4.2 47.9 3.3 43.9 2.7
1,700,000 1,445,000 99.6* 14.1 85.4 10.2 74.7 7.9 66.4 6.5 59.8 5.3 54.3 4.6 49.8 3.9
2,000,000 1,700,000 117.2* 20.2 100.4* 14.9 87.9 11.9 78.1 9.2 70.3 7.2 63.9 6.4 58.6 5.2

* The Asterisk indicates flow rates that exceed the Maximum Allowable Flow Rate of the Heat Exchanger and must not be used.

Cupro-Nickel heat exchanger required at flows above 75 GPM on Models 502 - 1302 and above 90 GPM on Models 1501 - 2001.

PF CONNECTION BOARD

1

2
3
4
5
6
7

8
9
10

11

12
13
14
15
16
17
18
19
20
21

22
23
24
25
26

27
28

VAL20009
CONNECTION BOARD

)

OM (Y
C

24V (BL)

DRIVE CCW (P)

DRIVE CW (W H)

4

3

2

1

N
O

123

DIR/REV