Install Instructions

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Instruction Sheet

iSeries - Outdoor Reset (iSeries-R)

2-Way, 3-Way and 4-Way iSeries Mixing Valves

102-145

The iSeries-R is a microprocessor-based valve designed to regulate the supply water temperature to a heating system by modulating

the position of an iSeries Mixing Valve. The iSeries-R operates the valve to provide outdoor reset to the heating system. A boiler sensor

installed on the return line to the boiler is used to protect the boiler against flue gas condensation.

Outdoor Reset

In order to properly control a hot water heating system, the heat supplied to the build-

ing must equal the heat lost by the building.

• The heat supplied to the building is directly proportional to the temperature of the

water and the surface area of the heating element. The higher the temperature of

the water flowing through the heating terminal, the higher the heat output.

• The heat lost from a building is dependent on the outdoor temperature. As the out-

door temperature drops, the building heat loss increases.

These two facts lead to the concept of outdoor reset which increases the supply water

temperature as the outdoor temperature drops. Using this approach, the heat lost

from the building is matched by the heat provided by the terminal units, therefore pro-

viding more comfort and energy savings.

Reset Ratio

The Reset Ratio sets the relationship between outdoor temperature and supply water

temperature. It determines the amount the supply water temperature is raised for

every 1 degree outdoor temperature drop. For example, if a Reset Ratio of 1.2 is

selected, the supply water temperature is increased by 1.2 degrees of every 1 degree

of outdoor temperature drop.

2-Way / 3-Way / 4-Way Mixing

An iSeries Mixing Valve may be used to mix the hot boiler water temperature with the cooler return water temperature from the sys-

tem loop. The position of the iSeries Mixing Valve is modulated in order to inject different rates of hot water into the cool system return

water. This allows for virtually any water temperature to be supplied to the heating system. When deciding between a 2-way, 3-way or

4-way valve, maximum flow rates must be considered. See the charts on page 2 and 3 before selecting style of valve / piping.

Most boilers cannot operate at low temperatures, therefore the iSeries-R can be modulated back in order to prevent the boiler from oper-

ating at cold temperatures, by installing the boiler return sensor.

SUPERSEDES: August 15, 2005 EFFECTIVE: June 1, 2009

Plant ID# 001-1025

WARNING: Do not use iSeries products for potable water tempering or in any application where

scalding can occur as a result of exposure to the tempered water.

Outdoor air temperature

Supply water temperature

(10)

(-1)

(-12)

-10°F

(-23)°C

11 0

(43)

(21)

(32)

210

(99)

170

(77)

150

(65)

130

(54)

190

(88)

2.2

2.0

1.6

0.8

1.0

0.6

(32)

50°F

(10)°C

1.2

0.2

0.4

1.4

1.8

Boiler

Sensor

Supply

Sensor

Outdoor

Sensor

iSeries-R

2-way Valve

Boiler

Sensor

Supply

Sensor

Outdoor

Sensor

3-way Valve

iSeries-R

3-way Valve, Multiple Temperature System

iSeries-R

Outdoor

Sensor

Supply

Sensor

Outdoor

Sensor

Supply

Sensor

Boiler Sensor Boiler Sensor

3-way Valve with High Temperature Zones

Supply

Sensor

iSeries-R

Outdoor

Sensor

Summary of content (8 pages)

PAGE 1
02-145 Instruction Sheet iSeries - Outdoor Reset (iSeries-R) 2-Way, 3-Way and 4-Way iSeries Mixing Valves SUPERSEDES: August 15, 2005 EFFECTIVE: June 1, 2009 Plant ID# 001-1025 WARNING: Do not use iSeries products for potable water tempering or in any application where scalding can occur as a result of exposure to the tempered water. The iSeries-R is a microprocessor-based valve designed to regulate the supply water temperature to a heating system by modulating the position of an iSeries Mixing Valve.
PAGE 2
Outdoor Sensor Supply Sensor Outdoor Sensor Supply Sensor iSeries-R iSeries-R Boiler Sensor Boiler Sensor 4-way Valve, Multiple Temperature System 4-way Valve with Low Temperature Zones Design When using an iSeries-R Mixing Valve, the following piping requirements must be considered for proper operation. 1. In order to hydraulically isolate the boiler loop from the injection or system loop primary/secondary piping must be used.
PAGE 3
-Way / 4-Way iSeries Mixing Valve Selection Select the 3-way or 4-way iSeries Mixing Valve based on the Pressure Drop charts below. iSeries 3-way Valve Pressure Drop Flow GPM 1⁄ " 2 1⁄ " 2 Sweat & Threaded Cv = 1.5 Union Cv = 3.5 3⁄ " 4 3⁄ " 4 Sweat & Threaded Cv = 3.5 Union Cv = 4.5 1" Sweat & Threaded Cv = 4 1" Union Cv = 4.5 PSI Ft. Head PSI Ft. Head PSI Ft. Head PSI Ft. Head PSI Ft. Head PSI Ft. Head 1 ⁄2 0.11 0.26 0.02 0.05 0.02 0.05 0.01 0.03 0.02 0.04 0.01 0.
PAGE 4
Minimum Boiler Return Temperature (DIP switch 3) The iSeries-R includes a boiler protection function which prevents low temperatures back to the boiler. Whenever the boiler sensor is installed, the iSeries-R monitors the boiler return temperature and modulates the valve down when the return temperature is near the minimum setting. The minimum setting is selected via DIP switch 3.
PAGE 5
Actuator Installation / Removal 1. Valve actuator may be attached to the valve body in either direction (see Figure A). The 3-way actuator must be attached with the power connections over the supply port to ensure proper flow direction (see Figure A). Figure C: Actuator Removal 2. Actuator removal: Remove valve actuator prior to soldering by rotating the actuator counterclockwise approximately 30 degrees and lifting upward approximately 3/4" (see Figure C). Step 1 3.
PAGE 6
Troubleshooting As in any troubleshooting procedure, it is important to isolate a problem as much as possible before proceeding. The error messages greatly simplify troubleshooting of the iSeries-R. When the control flashes an error message, identify the fault and follow standard testing procedures to confirm the problem. If you suspect a wiring fault, return to the wiring section on this brochure and carefully check all external wiring and wiring connections.
PAGE 7
Flow Coefficients Valve Size 3-way CV (KV)/FT. of Pipe Equiv.* 2-way CV (KV)/FT. of Pipe Equiv.* 1⁄ " 2 3 ⁄4" 4-way CV (KV)/FT. of Pipe Equiv.* Sweat & Threaded Union 4.9 (4.3) / 9.5 1.5 (3.0) / 18.6 3.5 (3.0) / 18.6 10.3 (8.9) / 8.4 — 3.5 (3.0) / 73.0 4.5 (3.9) / 44.2 7.0 (6.1) / 19 1" 8.9 (7.7) / 47.4 4.0 (3.5) / 234.9 4.5 (3.9) / 185.6 9.3 (8.1) / 44 11⁄4" — — — 17.5 (15.2) / 26 * At 4' per second (maximum recommended residential flow rate).
PAGE 8
Ordering Information i 1 Actuator Type: R = Reset S = Setpoint iSeries Size: 1 050 = ⁄2" 3 075 = ⁄4" 100 = 1" 125 = 11⁄4" Ball Type: 2 = 2-way 3 = 3-way 4 = 4-way Connection: C = Sweat T = Thread U = Union Replacement Parts Model Description 9300-2044RP 9300-2052RP Strap-on Sensor Outdoor Sensor iT024Q6A1 iU024Q6A1 Outdoor Reset Actuator Setpoint Actuator LIMITED WARRANTY STATEMENT Taco, Inc.