Mo. Code Regs. Ann. tit. 10, § 23-5.070
Construction Standards for Closed-Loop Heat Pump Systems That Use Refrigerants as the Heat Transfer Fluid
Effective Mar 10, 1994sections 256.606 and 256.626, RSMo (Cum. Supp. 1991).* Emergency rule filed Nov. 16, 1993, effective Dec. 11, 1993, expired April 9, 1994. Original rule filed Aug. 17, 1993, effective March 10, 1994. *Original authority: 256.606, RSMo (1991) and 256.626, RSMo (1985), amended 1991Division of Geology and Land Survey
PURPOSE: This rule sets standards for heat pump systems that use refrigerants in the closed-loop as the heat transfer fluid.
- (1) Direct Expansion Heat Pump Systems. These types of systems utilize a network of copper tubing or other material buried in a pit or trench. The refrigerant is circulated through the tubing allowing the heat transfer to take place. The ground coil must be installed by a method which prevents leakage of the refrigerant.
- (2) Any heat transfer fluids used in a direct expansion heat pump system must be nontoxic and nonhazardous such as HCFC-22, or others that are approved in advance by the division.
- (3) Heat pump systems utilizing refrigerants in their closed-loops may be placed into vertical wells if approval is received in advance from the division.
AUTHORITY: sections 256.606 and 256.626, RSMo (Cum. Supp. 1991).* Emergency rule filed Nov. 16, 1993, effective Dec. 11, 1993, expired April 9, 1994. Original rule filed Aug. 17, 1993, effective March 10, 1994. *Original authority: 256.606, RSMo (1991) and 256.626, RSMo (1985), amended 1991.